JPH07238982A - Liquid sealed vibro-isolating support - Google Patents

Abstract

PURPOSE:To aim at an increase in tuning elements by multiplying their numbers so as to make a liquid chamber cause its volumetric variation in maximum to a vibratory input. CONSTITUTION:Two rubber side walls 14 is applied to an interval between an inner cylinder 10 and an outer cylinder 12 at a specified interval, forming an enclosed space, and simultaneously an inner part of this enclosed space is partitioned off with each rubber partition wall being stuck in both vibratory input and orthogonal directions inclusive of the inner cylinder 10, and a liquid is sealed in this enclosed space, partitioning off it into two liquid chambers, and each of respective liquid chambers 22 to 28 in a liquid sealed vibro-isolating support interconnected with each liquid chamber through an orifice passage is partitioned off by rubber partition walls 18 and 20 to be stuck in parallel with these rubber partition walls further divided into two liquid chambers, namely, into four liquid chambers 22, 24, 26 and 28 in total, while these specified liquid chambers 22, 24 26 and 28 themselves existing at both sides of the rubber partition wall are interconnected with one another through two orifices 30 and 32.

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 such as an engine mount or roll mount for isolating vibration of an automobile engine, and more particularly to a liquid-filled anti-vibration support device having a high anti-vibration effect. .

[0002]

2. Description of the Related Art The phase angle of a medium and the spring constant have a great influence on the transmission of vibration, and there is a close relationship between the two. Speaking of this in relation to the frequency, the spring constant has a low level until the phase angle reaches its peak, but the spring constant has a characteristic that it immediately decreases immediately before that and then maintains a high level. Therefore,
In this type of vibration isolating support device, it is general to tune so that the phase angle of the liquid mass system consisting of the liquid chamber and the orifice passage reaches a peak in the frequency range where vibration is to be damped.

[0003]

On the other hand, vibrations of the engine of an automobile include vibrations of various frequencies from low frequency to high frequency such as engine shake, idling vibration, traveling vibration and the like. Therefore, if the peak of the phase angle is set in a specific frequency range, vibrations of other frequencies cannot be effectively isolated. In particular, the spring constant cannot be suppressed to a low value in a frequency range higher than the set frequency range, and the vibration isolation performance deteriorates.

Therefore, in the present invention, three or four liquid chambers are formed in series before and after the main vibration input direction (which is the load direction, hereinafter referred to as the vibration input direction), and each liquid chamber is formed separately. By communicating with the orifice passage, a plurality of liquid mass systems are set and the tuning range is widened. Incidentally, Japanese Patent Laid-Open No. 62-224744 and Japanese Utility Model Laid-Open No. 0-012343 also show that three or more liquid chambers are formed, but these have a damping effect on vibration input in each direction. Therefore, the respective liquid chambers are formed so as to cause a volume change with respect to the vibration input in each direction (the liquid chambers are not formed in series before and after the load direction).

[0005]

SUMMARY OF THE INVENTION Under the above problems, according to the present invention, two rubber side walls are stretched at a predetermined distance between an inner cylinder and an outer cylinder to form a sealed space, and The inside is partitioned by a rubber partition wall that extends in the direction perpendicular to the vibration input direction, including the inner cylinder, and the liquid is enclosed in a partitioned closed space to divide it into two liquid chambers, and each liquid chamber is connected by an orifice passage. In the liquid-filled anti-vibration support device, each of the liquid chambers is partitioned by a rubber diaphragm stretched in parallel with the rubber partition wall and further divided into two liquid chambers to form a total of four liquid chambers, while on both sides of the rubber partition wall. The present invention provides a liquid-filled anti-vibration support device characterized in that existing specific liquid chambers are communicated with each other through orifice passages.

Further, according to the present invention, two rubber side walls are stretched at a predetermined distance between the inner cylinder and the outer cylinder to form a closed space, and the inside of the closed space includes the inner cylinder and a vibration input direction. Liquid is enclosed in a rubber partition that is stretched at a right angle to, and the liquid is enclosed in a closed space that is divided into two liquid chambers, and each liquid chamber is connected by an orifice passage. One of the chambers is partitioned by a rubber septum stretched in parallel with the rubber partition, and further divided into two liquid chambers to form a total of three liquid chambers, while specific liquid chambers existing on both sides of the rubber partition and the rubber partition There is provided a liquid-filled anti-vibration support device, characterized in that the liquid chambers present on one side of the above are communicated with each other through orifice passages.

[0007]

By the above means, at least two liquid mass systems consisting of two liquid chambers and the orifice passages connecting them are formed independently, and the peak of the phase angle is determined by the number of these systems. Can be derived as much as. Therefore, by tuning each peak to a desired frequency, it is possible to suppress an increase in the spring constant at that time and simultaneously improve the vibration damping property. Further, in this configuration, since the liquid chambers are formed in series in the vibration input direction, the liquid chamber reacts most sensitively to the input vibration and causes the maximum volume change. In other words, the number of liquid chambers is increased with a structure that does not reduce the pressure receiving area for vibration input.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view of a liquid-filled anti-vibration supporting device showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB, and FIG. 5 is a view taken in the direction of the arrow D in FIG. 3 (both of FIG. 4 and FIG. 5 are obtained by removing the outer cylinder). The liquid-filled anti-vibration support device in this example has two rubber side walls 14 between an inner cylinder 10 and an outer cylinder 12 which are arranged in parallel with each other at a constant interval at right angles to the axial direction, and an inner cylinder. 10
A rubber partition wall 16 is stretched between the rubber sidewalls 14 in a horizontal plane including the above to form a space partitioned above and below the rubber partition wall 16. Therefore, in this case, the vertical direction is the vibration input direction.

By the way, in this case, the inner peripheral side and the outer peripheral side of each space are further partitioned by the rubber partition films 18 and 20 parallel to the rubber partition wall 16, and two are respectively provided on the opposite sides of the rubber partition wall 16 so as to make a total of four. Form one space. Next, by enclosing a liquid in this space (specifically, the above-mentioned rubber elastic material is molded on the inner cylinder 10 and fitted into the outer cylinder 12 in the liquid), four spaces are formed in each space. Liquid chamber 22, 24, 26, 28
And And the four liquid chambers 22, 24, 26, 28
Among these, one liquid chamber 22 on the outer peripheral side and the other liquid chamber 26 on the inner peripheral side, and one liquid chamber 24 on the inner peripheral side and the other liquid chamber 28 on the outer peripheral side are connected by orifice passages 30 and 32, respectively. .

In this case, the orifice passages 30 and 32 are
A groove is formed in the center outer circumference of rubber blocks 34, 36 that are integrally formed with the rubber diaphragms 18, 20 and project circumferentially from one end of the rubber partition wall 16 toward the other. In addition, core blocks 38 and 40 are enclosed in the rubber blocks 34 and 36, the rubber side wall 14 and the like to enhance the strength, and a through hole 42 is formed in the rubber partition wall 16 to form the rubber side wall 14. The rubber partition 16 is designed to have a substantially uniform thickness. This is because when an extremely weak spot or a strong spot is created, only the weak spot is deformed and the movement of the liquid becomes worse. The rubber block bodies 34, 3
6 also functions as a stopper that regulates the inner cylinder 10 when it is excessively displaced.

FIG. 6 shows the characteristics of the phase angle (δ) and the spring constant (K *) of the vibration isolating support device having the above-described structure in relation to the frequency (Hz). The two peaks P ₁ and P ₂ are tuned so as to come to the low frequency of the engine shake and the middle frequency of the idling vibration. By doing so, the engine shake and the idling vibration can be reliably damped, and at the same time, the vibration transmission in the frequency range can be reduced by reducing the spring constant near each peak.

FIG. 7 shows the same characteristic, but in this example, two peaks P ₁ and P ₂ of the phase angle are tuned so as to come to the low frequency of the engine shake and the high frequency of the running vibration. By doing so, the engine shake and the traveling vibration can be surely damped, and in addition, the vibration transmission in the frequency range can be reduced by reducing the spring constant near each peak. Is the same.

FIGS. 8 and 9 are sectional views corresponding to AA and BB in FIG. 1 showing another embodiment, but in this embodiment, four liquid chambers 22, 24, 26 are provided. , 28, but the liquid chambers 22, 28 on the outer peripheral side and the liquid chambers 24, 26 on the inner peripheral side are provided with orifice passages 44, 4 respectively.
It communicates with 6. By doing so, the combination of the liquid chambers 22, 24, 26, 28 communicated with each other is changed, and the liquid mass system can be changed.

FIGS. 10 and 11 are sectional views corresponding to AA and BB in FIG. 1 showing another embodiment. In this embodiment, two liquids are provided above the rubber partition wall 16. Chamber 22, 24
, One liquid chamber 48 is formed below, and the upper liquid chamber 2
Two and 24 are communicated with each other through an orifice passage 50, and one upper liquid chamber 24 and a lower liquid chamber 48 are communicated through an orifice passage 52. Even in this case, the liquid mass system can be changed as described above. A rubber block 54 serving as a stopper is provided at the bottom of the lower liquid chamber 50.
Is provided (56 is a core metal).

FIG. 12 is also a cross-sectional view showing another embodiment, but in this embodiment, one or both of the rubber diaphragms 18 and 20 are bent, and some of them are radially arranged inside the rubber side wall 14. The ribs 58 are formed. This allows
It is easily deformed, and the liquid can be easily moved. FIG. 13 is also a sectional view showing another embodiment, but in this embodiment, some ribs 60 are formed on the outer side of the rubber side wall 14 in the radial direction. This has the advantage of increasing the pumping effect.

Although FIG. 14 is also a view of another embodiment of FIG. 3 taken in the direction of arrow E (outer cylinder 12 is removed), in this embodiment, one or both of the orifice passages 30, 32 are made to meander. It is a thing. This makes it possible to increase the flow path length, increase flow resistance when the liquid moves, and increase the damping effect.

[0017]

As described above, according to the present invention, since two or more liquid mass systems in which the liquid chambers are communicated with each other through the different orifice passages are formed in one vibration isolating support device, the phase angle and the spring are arranged. You can tune the constant to two or more frequency ranges,
Increases damping and damping over a wide range of frequencies. Then, at this time, since each liquid chamber is formed in series with respect to the vibration input direction, that is, since the partition body that partitions each liquid chamber is stretched in the direction perpendicular to the vibration input direction, It succeeded in increasing the number of liquid chambers while ensuring the requirement of being most easily deformed.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a liquid-filled anti-vibration support device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a view on arrow C in FIG.

5 is a view on arrow D of FIG. 3. FIG.

FIG. 6 is a characteristic showing the relationship between the phase angle and the spring constant of the anti-vibration support device of the present invention as a function of frequency.

FIG. 7 is a characteristic showing the relationship between the phase angle and the spring constant of the anti-vibration support device of the present invention as a function of frequency.

FIG. 8 is a sectional view taken along line AA of FIG. 1 showing another embodiment of the present invention.

9 is a sectional view taken along line BB of FIG. 1 showing another embodiment of the present invention.

FIG. 10 is a sectional view taken along line AA of FIG. 1 showing another embodiment of the present invention.

FIG. 11 is a sectional view taken along line BB of FIG. 1 showing another embodiment of the present invention.

FIG. 12 is a sectional view of a liquid-filled anti-vibration support device according to another embodiment of the present invention.

FIG. 13 is a sectional view of a liquid-filled anti-vibration support device according to another embodiment of the present invention.

FIG. 14 is a view taken in the direction of arrow E in FIG. 3 showing another embodiment of the present invention.

[Explanation of symbols]

 10 Inner Cylinder 12 Outer Cylinder 14 Rubber Side Wall 16 Rubber Partition 18 Rubber Separation 20 Rubber Separation 22 Liquid Chamber 24 Liquid Chamber 26 Liquid Chamber 28 Liquid Chamber 30 Orifice Passage 32 Orifice Passage

Claims (2)

[Claims] 1. A hermetically sealed space is formed by stretching two rubber side walls at a predetermined distance between an inner cylinder and an outer cylinder, and the interior of the hermetically sealed space including the inner cylinder is perpendicular to the vibration input direction. In a liquid-filled anti-vibration support device in which liquid is enclosed in a partitioned closed space and liquid is enclosed in a closed space that is divided into two liquid chambers, and each liquid chamber is connected by an orifice passage, each liquid chamber is separated. It is divided by a rubber diaphragm stretched in parallel with the rubber partition to further divide into two liquid chambers to form a total of four liquid chambers, while specific liquid chambers existing on both sides of the rubber partition are communicated with each other through orifice passages. A liquid-filled anti-vibration support device. 2. A hermetically sealed space is formed by stretching two rubber side walls at a predetermined distance between an inner cylinder and an outer cylinder, and the inside of the hermetically sealed space including the inner cylinder is perpendicular to the vibration input direction. In a liquid-filled anti-vibration support device in which liquid is enclosed in a closed space that is partitioned by two rubber chambers, and each liquid chamber is connected by an orifice passage, one of the liquid chambers It is partitioned by a rubber septum stretched in parallel with the rubber partition and further divided into two liquid chambers to form a total of three liquid chambers, while specific liquid chambers existing on both sides of the rubber partition and on one side of the rubber partition. A liquid-filled anti-vibration support device, characterized in that the respective liquid chambers are communicated with each other through orifice passages.