JP3513655B2 - Anti-vibration support device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration support device having a pair of liquid-filled anti-vibration units on both sides of a vibrating body such as an engine. When negative pressure or atmospheric pressure is alternately introduced into each equilibrium chamber that forms a unit at appropriate frequencies, a negative pressure introduction type liquid-filled anti-vibration support that makes the respective frequencies different from left to right It relates to the device.

[0002]

2. Description of the Related Art Among vibration damping devices, particularly engine mounts for automobiles, the engine, which is a power source, is used under various conditions from idling to the maximum rotation speed. Therefore, it must be able to handle a wide range of frequencies. Therefore, in order to meet such a plurality of conditions, a liquid chamber is provided inside and a fluid bag that changes in volume at a specific frequency is provided in the liquid chamber, or via a diaphragm or the like. A liquid-filled type vibration damping device has been devised in which a negative pressure chamber (equilibrium chamber) that is partitioned and formed is provided, and is already known, for example, from Japanese Patent Publication No. 6-29634.

[0003]

By the way, a conventional general anti-vibration supporting device has a balance chamber into which a negative pressure is introduced from a negative pressure source 60 connected to an engine intake system 610, as shown in FIG. 4, for example. Liquid-filled anti-vibration device (anti-vibration unit)
10 is provided on one side of a vibrating body such as the engine 40. Then, a normal liquid-filled type vibration damping device 100 and the like are provided on the other one side. In an engine having such an engine mounting system (anti-vibration mechanism), for example, in order to shut off engine idling vibration, vibration from the engine 40 side is input to the control means 50 via a sensor or the like, and in response to this input signal. The control means 50 actuates the switching means 30 so that negative pressure or atmospheric pressure is alternately introduced into the equilibrium chamber of the vibration isolation unit 10. Therefore, in such a conventional device, the antivibration unit 10 can be operated only in a specific state (specific frequency). As a result, when the input vibration during the engine idling operation includes the secondary component of the engine explosion vibration as shown in FIG. 5A, for example, the vibration state as shown in FIG. Switching means 3
0 and even if the equilibrium chamber of the vibration isolation unit 10 is operated, the vibration of the secondary component as shown in FIG. 5C will be left without being removed. The vibration of this residual component is propagated to the vehicle body side, causing unpleasant vibration in the passenger compartment.
This will cause noise. In order to solve such a problem, two liquid-filled type vibration damping units are arranged on both sides of a vibrating body such as an engine, and one of them is synchronized with the primary vibration of the engine explosion vibration during engine idling operation. In addition to operating in the state, the other one is operated in a state synchronized with a higher-order vibration other than the primary vibration, for example, a secondary frequency, thereby effectively absorbing / blocking engine idling vibration. It is an object (problem) of the present invention to provide an anti-vibration supporting device that is made to perform.

[0004]

In order to solve the above-mentioned problems, the following measures are taken in the present invention. That is, according to the first aspect of the invention, with respect to the vibration-damping support device that supports a vibration body such as an engine, a first connection member attached to the vibration body and a second connection member attached to a member on the vehicle body side. An insulator for absorbing and blocking the vibration from the vibrating body between the first connecting member and the second connecting member, and a chamber wall of which is formed by a part of the insulator, Of the main chamber, a sub-chamber connected to the main chamber via the first orifice and having a part of the chamber wall defined by the first diaphragm, and a second diaphragm with respect to the main chamber. Based on a liquid-filled type vibration isolation unit consisting of an equilibrium chamber that is formed by partitioning the liquid-filled type vibration isolation unit, one liquid-filled type vibration isolation unit is provided on each side of the vibrating body. Either the negative pressure or the atmospheric pressure is continuously introduced into each equilibrium chamber of the vibration unit, or the switching operation is performed so that they are alternately introduced while being synchronized with the engine vibration of a specific frequency. And a negative pressure and an atmospheric pressure are alternately applied to any one of the equilibrium chambers in a state synchronized with the primary frequency of engine explosion vibration during engine idling operation. And the negative pressure and the atmospheric pressure are alternately introduced to the other one in a state of being synchronized with the frequency other than the primary frequency of the engine explosion vibration during the engine idling operation. It was decided to adopt the configuration described in.

By adopting such a configuration, in the present invention, it becomes possible to absorb and block vibration components other than the primary frequency of the engine explosion vibration, and to reduce engine idling vibration. The absorption and blocking functions can be enhanced (see FIG. 3). That is, in the present invention, the anti-vibration unit on either side is operated in a state of being synchronized with the primary frequency of the engine explosion vibration, and the other one is operated, for example, on the engine explosion vibration. By operating in synchronization with the secondary frequency, it is possible to absorb and block not only the primary vibration but also the vibration components other than the primary vibration including the secondary vibration. Like Therefore, it is possible to efficiently suppress the vibration transmission to the vehicle body side during idling operation.

Next, the invention according to claim 2 will be described. This one is also the same as the one described in claim 1 in the basic point. That is, in the present invention, in the vibration isolating support device according to claim 1, among the equilibrium chambers,
A throttling mechanism is provided between the switching means and the negative pressure source for performing switching control on the side of the equilibrium chamber where negative pressure or atmospheric pressure is alternately introduced in a state synchronized with frequencies other than the primary frequency of engine explosion vibration. It was decided to adopt the configuration provided. By adopting such a configuration, in the present invention, in general, to the equilibrium chamber of the vibration isolation unit on the side intended for the purpose of vibration isolation of higher-order components whose vibration energy has a small value,
Negative pressure with less energy is introduced via the throttle. On the other hand, to the equilibrium chamber of the other vibration isolation unit for the purpose of shutting off the primary vibration, the high negative pressure energy in the state in which the negative pressure energy amount narrowed by the throttling mechanism is added is provided. As a result, the primary vibration component can be absorbed and blocked efficiently.
As a result, all vibration energy is efficiently absorbed and blocked.

Next, the invention according to claim 3 will be described. Also in this case, the basic points are the same as those described in claim 1 or claim 2. That is, in the present invention, in the vibration isolating support device according to claim 1 or 2, the liquid on the main chamber side is provided on the main chamber side separated by the second diaphragm forming a part of the equilibrium chamber. Is provided, and a second orifice through which the liquid on the main chamber side flows is provided between the third liquid chamber and the main chamber. By adopting such a configuration, in the present invention, the basic specifications of the two vibration isolation units can be made common, and the cost reduction of the vibration isolation unit due to the common use of parts, The manufacturing cost of the entire anti-vibration supporting device can be reduced. That is, in the two vibration isolation units, the other parts (parts) except the second orifice are made common, and only the function of the second orifice is changed, so that one of them corresponds to the primary frequency. It becomes possible to adjust (tune) for the high output that has been made possible, and to adjust (tune) the other one for the low output that corresponds to the higher order frequency.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. Although it relates to an embodiment of the present invention, as shown in FIG. 1, a liquid-filled type vibration isolation unit (a pair) is provided in front of or behind a vibrating body 4 such as an engine, or on the left or right. Anti-vibration unit) 1A, 1B and a set of these anti-vibration units 1A,
1B, a set of switching means 3 for performing a switching operation so as to supply negative pressure or atmospheric pressure continuously or alternately in a state synchronized with the engine idling vibration,
Negative pressure paths 2 and 2 ′, which are for supplying a negative pressure from a predetermined negative pressure source 6 to each of the vibration isolation units 1A and 1B through the switching means 3 and are formed of hoses, and these negative pressure paths. Of (2) and (2), a negative pressure is supplied to a vibration isolation unit (1B side in the present embodiment) provided for the purpose of isolating higher-order vibrations other than the primary vibration related to engine explosion vibration. A diaphragm (diaphragm mechanism) 21 provided on the way,
Control means 5 for controlling the switching operation of the pair of switching means 3
It is basically composed of and.

In such a basic structure, the switching means 3 is composed of a switching valve 31 such as a three-way valve and a solenoid 32 for driving the switching valve 31, as shown in FIG. is there. The atmospheric pressure introducing side of the switching valve 31 having such a configuration is open to the atmosphere, and the atmospheric pressure is freely introduced. Also, the negative pressure introduction side,
As shown in FIG. 1, a negative pressure source (negative pressure tank) 6 connected to an engine intake system 62 is connected via predetermined negative pressure paths 2 and 2 '. It should be noted that, in such a negative pressure path 2, 2 ′, the prevention (tuning) is performed for the purpose of absorbing / blocking higher-order vibration components of engine explosion vibration (secondary explosion vibration in the present embodiment). A predetermined diaphragm (throttle mechanism) 21 is provided in the middle of the one (2) connected to the switching means 3 which carries out the switching operation on the shaking unit 1B side. The high-order vibration components including the secondary explosion vibration have a vibration energy smaller than that of the primary explosion vibration, and the negative pressure energy to be supplied can be small. Will be provided. The amount of negative pressure energy supplied to the image stabilizing unit 1A side is increased by that amount.

Next, a set of switching means 3 into which a negative pressure is introduced via each negative pressure path 2, 2 ′ having such a configuration.
The control means 5 for controlling the switching operation of is composed of a microcomputer or the like formed on the basis of an arithmetic means such as a microprocessor unit (MPU), and the vibration from the vibrating body 4 such as an engine, specifically, A signal such as the opening degree of the valve forming the valve mechanism 44 or the rotation angle of the crankshaft 41, which is detected by various sensors, is input, and the switching means 3 is switched in accordance with the input signal. It is designed to control the operation.

Next, a predetermined negative pressure or the like is introduced through the set of switching means 3 and the negative pressure paths 2, 2'having the above-mentioned structure, and the vibrating body 4 such as the engine is supported. The vibration isolation units 1A and 1B, which play a role of performing the function, are composed of a liquid-filled type vibration isolation device (vibration isolation unit) 1 as shown in FIG. As shown in FIG. 1, the liquid-filled type anti-vibration unit (anti-vibration unit) 1 is mounted in pairs on both sides of a vibrating body 4 such as an engine. Is formed as a system. Such a vibration isolation unit 1
The specific configuration thereof will be described below. That is, as shown in FIG. 2, the anti-vibration unit 1 includes a first connecting member 9 attached to the vibrating body 4 side of an engine and the like, a second connecting member 99 attached to the vehicle body side, and the first connecting member 99. An insulator 7 which is between the connecting member 9 and the second connecting member 99 and absorbs and blocks vibrations from the vibrating body 4.
And a main chamber 1 which is provided in series with the insulator 7 and in which a liquid which is an incompressible fluid is sealed
2, a sub chamber 16 which is connected to the main chamber 12 through a first orifice 15 and a part of the chamber wall is partitioned and formed by a first diaphragm 17, and the above first chamber with respect to the sub chamber 16. Air chamber 18 provided with a diaphragm 17 separated
And an equilibrium chamber 13 that is partitioned from the main chamber 12 via another diaphragm (second diaphragm) 11,
It is basically composed of

In this basic structure, the insulator 7 is made of a vibration-proof rubber material,
The first connecting member 9 is integrally connected to the first connecting member 9 by vulcanizing adhesive means or the like. Then, in the lower portion of the insulator 7 having such a configuration, a main chamber 12 in which a chamber wall is formed is provided in a part of the insulator 7. Further, in such a lower part of the main chamber 12,
The equilibrium chamber 13 in which negative pressure or atmospheric pressure is alternately introduced in a predetermined cycle is provided. As shown in FIG. 2, a liquid resonance mechanism including a second diaphragm 11, a second orifice 125, a third liquid chamber 123, and the like is provided between the equilibrium chamber 13 having the above-described configuration and the main chamber 12. Is provided.
As a result, the pressure fluctuation introduced into the equilibrium chamber 13 is transmitted through the vibration of the second diaphragm 11, and further the liquid vibration in the third liquid chamber 123 and the second orifice 125.
It is propagated to the liquid in the main chamber 12 via the liquid resonance inside. As a result, the force wave (generated wave) propagated in the main chamber 12 is adjusted to a state close to a regular sine wave. Regarding the vibration isolation units 1A and 1B having such a configuration, in the present embodiment, the other parts (parts) other than the members forming the second orifice 125 and the third liquid chamber 123 are Anti-vibration unit 1A, 1
Both B have the same structure. That is, the parts are made common and shared. Then, the specifications (specifications) of the second orifice 125 and the third liquid chamber 123 are set according to the respective frequencies of vibration. That is, the vibration isolation unit 1
The A side is set to block the primary vibration component of the engine explosion vibration, while the vibration isolation unit 1B is set (adjusted) to block the secondary vibration component of the engine explosion vibration. I will. As a result, the two types of vibrations can be efficiently absorbed and blocked while sharing the parts.

Next, the operation mode and the like of the present embodiment having such a configuration will be described. First, the vibration from the vibrating body 4 is propagated to the insulator 7 made of a rubber material or the like via the first connecting member 9 in FIG. This insulator 7
Most of the vibrations that have been transmitted to
The insulator 7 will be absorbed or blocked by deformation or the like. However, some of them are not cut off at the insulator 7, but are cut off at the next vibration mechanism portion including the equilibrium chamber 13 and the like. The specific operation and the like will be described below.
That is, with respect to idling vibration, by operating the switching means 3, negative pressure or atmospheric pressure is alternately introduced into the liquid-filled vibration isolation unit (vibration isolation unit) 1 at a specific frequency. To By such an operation, the engine idling vibration is absorbed and cut off.

By the way, such engine idling vibration does not consist of vibration of one frequency.
In many cases, the primary vibration component of the engine explosion vibration is used as a basis, and high-order vibration components such as secondary vibration are added thereto. That is, the input vibrations propagated to the vibration isolation units 1A and 1B are in a state of including high-order components, as shown in FIG. In order to absorb and block such input vibration, in the present embodiment, a vibration force in a state synchronized with the explosion primary vibration is generated on the side of one of the vibration isolation units 1A shown in FIG. I will let you. Specifically, a generated wave (power wave) consisting of a sine wave as shown in FIG.
The switching means 3 is operated so as to be generated from the third liquid chamber 123 and further from the second orifice 125. That is, the atmospheric pressure and the negative pressure from the negative pressure source 6 are alternately introduced to the equilibrium chamber 13 side of the vibration isolation unit 1A in a cycle synchronized with the primary explosion vibration as shown in FIG. To do so. On the other hand, in the equilibrium chamber 13 on the side of the other vibration isolation unit 1B, an exciting force synchronized with the secondary explosion vibration is generated. Specifically, a generated wave (power wave) composed of a sine wave as shown in FIG.
The switching means 3 is operated so as to be generated from the third liquid chamber 123 on the vibration isolation unit 1B side and further from the second orifice 125. That is, the atmospheric pressure and the negative pressure from the negative pressure source 6 are alternately introduced into the equilibrium chamber 13 side of the vibration isolation unit 1B in a cycle synchronized with the secondary explosion vibration as shown in FIG. To do so. in this way,
By operating the two anti-vibration units 1A and 1B in different states, it is possible to efficiently absorb and block engine idling vibration including high-order vibration components in engine explosion vibration.

Incidentally, in such an engine idling vibration absorption and cutoff stroke, a negative pressure supply path (negative pressure) to the antivibration unit 1B on the side adjusted (set) for the purpose of absorbing and cutting off higher order vibration components. As shown in FIG. 1, a predetermined diaphragm (throttle mechanism) 21 is provided in the pressure path 2 so that the vibration isolation unit 1B for the purpose of absorbing and blocking higher-order vibration components. The negative pressure energy supplied to the equilibrium chamber 13 is reduced. On the contrary, the equilibrium chamber 1 of the other side (1A) for the purpose of absorbing and blocking the primary vibration component which is the vibration isolation unit
Into the inside of 3, the amount of negative pressure energy added with the negative pressure energy reduced by the throttle 21 is introduced (supplied). As a result, a large value of negative pressure energy is supplied to the antivibration unit 1A for the purpose of absorbing and blocking the primary vibration component having a large amount of input vibration energy, and the wave generated by the antivibration unit 1A is supplied. (Power wave) also has a large value. As a result, vibrations from the vibrating body 4 such as the engine can be efficiently absorbed and blocked by the anti-vibration units 1A and 1B.

Next, for the engine shake, which is a vibration of a frequency lower than the above idling vibration, FIG.
The liquid is allowed to flow in the first orifice 15 that connects the main chamber 12 and the sub chamber 16 in the above, thereby absorbing and blocking the engine shake. That is, in the present embodiment, first, the pair of switching means 3 is activated to continuously supply the negative pressure to the respective equilibrium chambers 13 forming the pair of vibration isolation units 1A and 1B in FIG. To do so. As a result, each of the equilibrium chambers 13 is held in a state where the volume is zero.
Therefore, in each of the vibration isolation units 1A and 1B, the liquid comes to flow in the first orifice 15 formed between the main chamber 12 and the sub chamber 16, and the liquid is accompanied by the flow. The viscous resistance causes a predetermined damping force. The damping force (high damping characteristic) causes the engine shake to be damped (suppressed). Thus, in the present embodiment, by operating the pair of switching means 3,
Eliminates idling vibration and engine shake efficiently
Be able to absorb and block.

[0017]

According to the present invention, with respect to the vibration-damping support device for supporting a vibrating body such as an engine, a first connecting member attached to the vibrating body and a second connecting member attached to a member on the vehicle body side. An insulator for absorbing and blocking the vibration from the vibrating body between the first connecting member and the second connecting member, and a chamber wall of which is formed by a part of the insulator, Of the main chamber, a sub-chamber connected to the main chamber via the first orifice and having a part of the chamber wall defined by the first diaphragm, and a second diaphragm with respect to the main chamber. Based on a liquid-filled type vibration isolation unit consisting of an equilibrium chamber that is partitioned and formed through the above, one liquid-filled type vibration isolation unit is provided on each side of the vibrating body. Shaking unit Either the negative pressure or the atmospheric pressure is continuously introduced into each of the equilibrium chambers, or the switching operation is performed so that they are alternately introduced while being synchronized with the engine vibration of the specific frequency. A pair of switching means is provided, and negative pressure and atmospheric pressure are alternately introduced into one of the equilibrium chambers in synchronization with the primary frequency of engine explosion vibration during engine idling operation. In addition, the negative pressure and the atmospheric pressure are alternately introduced to the other one in a state of being synchronized with a frequency other than the primary frequency of the engine explosion vibration during the engine idling operation. Since the configuration is adopted, it is possible to absorb and block vibration components other than the primary frequency of the engine explosion vibration. That is, in the present invention,
Set the anti-vibration unit on either side to
By operating in synchronization with the secondary frequency and operating the remaining one on the other side, for example, in synchronization with the secondary frequency of the engine explosion vibration,
Not only the secondary vibration, but also the secondary vibration and other higher-order vibration components can be absorbed and blocked. As a result, it is possible to efficiently suppress the transmission of vibration to the vehicle body side during idling operation.

Further, in the equilibrium chamber forming each vibration isolation unit, a negative pressure and an atmospheric pressure are alternately introduced in synchronization with a higher frequency other than the primary frequency of the engine explosion vibration. In a structure in which a diaphragm mechanism is provided between the switching means for performing the switching control on the room side and the negative pressure source, in general, the vibration energy of a high-order component having a small value is generated. A small amount of negative pressure energy is introduced into the equilibrium chamber of the anti-vibration unit on the side intended for isolation, and the other equilibrium chamber of the anti-vibration unit on the side intended for isolation of the primary vibration is introduced. The high negative pressure energy in the state where the negative pressure energy amount reduced by the throttle mechanism is added is supplied, and the primary vibration component is efficiently absorbed and blocked. As a result, it has become possible to efficiently absorb and block all vibration energy.

A third liquid chamber into which the liquid on the main chamber side flows is provided on the side where the second diaphragm forming a part of the equilibrium chamber of the vibration isolation unit is provided, and the third liquid chamber and the above In the structure in which the second orifice through which the liquid on the main chamber side flows is provided between the main chamber and the main chamber, the basic specifications of the two vibration isolation units can be shared. As a result, it is possible to reduce the cost of the anti-vibration unit by using common parts, and consequently to reduce the manufacturing cost of the entire anti-vibration support device. That is, in the two vibration isolation units, the other parts (parts) except the second orifice are made common, and only the function of the second orifice is changed, so that one of them corresponds to the primary frequency. It became possible to adjust (tune) for the high output that was made possible, and it became possible to adjust (tune) the other one for the low output corresponding to the higher order frequency.

[Brief description of drawings]

FIG. 1 is a skeleton diagram showing the overall configuration of the present invention.

FIG. 2 is a vertical cross-sectional view showing the overall configuration of a liquid-filled type vibration damping unit which is a main part of the present invention.

FIG. 3 is a diagram (graph) showing a vibration-proof characteristic (function) of the present invention.
Is.

FIG. 4 is a skeleton diagram showing an overall configuration of a conventional example.

FIG. 5 is a diagram (graph) showing a vibration isolation characteristic (function) of a conventional example.
Is.

[Explanation of symbols] 1 Liquid-filled anti-vibration unit (anti-vibration unit) 1A One vibration isolation unit 1B The other anti-vibration unit 11 Second diaphragm 12 Main room 123 Third liquid chamber 125 second orifice 13 Equilibrium chamber 15 First orifice 16 Sub-room 17 First diaphragm 18 air chamber 2 Negative pressure path 2'Negative pressure path 21 Aperture mechanism (Aperture) 3 switching means 31 Switching valve 32 solenoid 4 Vibration body (engine) 41 crankshaft 44 Valve mechanism 5 Control means 6 Negative pressure source (negative pressure tank) 62 Intake system 7 insulator 9 First connection member 99 Second connection member

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-13-59542 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16F 13/26

Claims (3)

(57) [Claims] 1. A vibrating body comprising: a first connecting member attached to a vibrating body; a second connecting member attached to a member on a vehicle body side; and a vibrating body located between the first connecting member and the second connecting member. An insulator that absorbs and blocks vibrations from the main chamber, a chamber wall of which is formed by a part of the insulator, and a main chamber in which liquid is sealed; and the main chamber is connected to the main chamber via a first orifice. In addition, a liquid-filled type vibration isolation unit consisting of a sub chamber in which a part of the chamber wall is defined by the first diaphragm and an equilibrium chamber defined by the second diaphragm via the second diaphragm On the foundation, one liquid-filled type vibration isolation unit is provided on each side of the vibrating body, and either one of negative pressure or atmospheric pressure is placed in each equilibrium chamber of such two liquid-filled type vibration isolation units. Stuff A set of switching means for performing a switching operation so as to be continuously introduced or alternately introduced in a state of being synchronized with engine vibration of a specific frequency is provided, and one of the above-mentioned equilibrium chambers is provided. Is one of the engine explosion vibrations during engine idling operation
Negative pressure and atmospheric pressure are introduced alternately while synchronizing with the next frequency, and to the other one,
A vibration-damping support device, wherein negative pressure and atmospheric pressure are alternately introduced in a state of being synchronized with a frequency other than the primary frequency of engine explosion vibration during engine idling operation. 2. The anti-vibration support device according to claim 1,
Of the above equilibrium chamber, a switching means and a negative pressure source for performing switching control on the equilibrium chamber side in which negative pressure or atmospheric pressure is alternately introduced in synchronization with frequencies other than the primary frequency of engine explosion vibration. An anti-vibration support device characterized in that a diaphragm mechanism is provided between them. 3. The anti-vibration support device according to claim 1, wherein the liquid on the main chamber side flows into the main chamber side separated by a second diaphragm forming a part of the equilibrium chamber. In addition to providing a third liquid chamber for liquid, a liquid-filled type vibration damping unit is provided between the third liquid chamber and the main chamber to provide a second orifice through which the liquid on the main chamber side flows. An anti-vibration support device characterized by: