JP2587360Y2 - Liquid-filled mount - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a liquid-filled mount according to a vibration control technology. The liquid-filled mount of the present invention is mainly used for a vibration-proof support structure of a car cabin.

[0002]

2. Description of the Related Art Known liquid-filled mounts of this type are:
As shown in FIG. 2, the input vibration is absorbed and attenuated by the elastic deformation of the elastic body a and the flow resistance of the hydraulic fluid c passing through the orifice passage b.
This liquid-filled mount has a problem that when the input vibration is a high-frequency small-amplitude vibration, the vibration cannot be sufficiently absorbed and attenuated.

Therefore, the inventor of the present application has previously devised a liquid-filled mount shown in FIG. This liquid-filled mount has the following configuration.

That is, an outer peripheral rigid member 53 is connected to an outer peripheral side of an inner peripheral rigid member 51 via an elastic body 52, and the inner peripheral rigid member 51 and the outer peripheral rigid member 53 form a diaphragm 54. Connected through. A liquid chamber 55 is provided so as to be surrounded by the inner peripheral side rigid member 51, the elastic body 52, the outer peripheral side rigid member 53, and the diaphragm 54.
An orifice plate 56 is fixed to the inner periphery of the rigid member 53 on the outer periphery inside 5. A sub-diaphragm 57 is integrally formed with the elastic body 52, a sub-diaphragm plate 58 is bonded (vulcanized) to the tip of the sub-diaphragm 57, and the sub-diaphragm plate 58 is slidable on the inner peripheral surface of the orifice plate 56. Has become. The liquid chamber 55 is partitioned into two chambers 59 and 60 by an orifice plate 56, a sub-diaphragm 57, and a sub-diaphragm plate 58, and the orifice plate 56 is provided with an orifice flow path 61 for communicating the two chambers 59 and 60 with each other. Is filled with a working fluid 62.

[0005] The liquid-filled mount having the above configuration operates as follows when the input vibration is a vibration with a low frequency and a large amplitude and when the input vibration is a vibration with a high frequency and a small amplitude. A) When the input vibration is a low-frequency large-amplitude vibration When the vibration is input, the inner rigid member 51 and the outer rigid member 53 are relatively displaced, and the elastic body 52 is elastically deformed. The hydraulic fluid 62 moves from one of the two chambers 59 and 60 to the other through the orifice flow channel 61 due to the pumping action due to the elastic deformation of the two chambers 59 and 60, and the vibration is absorbed and attenuated by the flow resistance generated during the passage. B) When the input vibration is a high-frequency small-amplitude vibration When the vibration is input, the inner peripheral rigid member
1 and the rigid member 53 on the outer peripheral side are displaced relative to each other to
Is elastically deformed, but the vibration is absorbed and attenuated only by the resonance of the sub-diaphragm 57 because the elastic deformation amount is small.

A sub-diaphragm plate 58 is adhered to the tip of the sub-diaphragm 57 and the sub-diaphragm plate 58 is slidable with respect to the inner peripheral surface of the orifice plate 56. 57 is not pressed against the orifice plate 56 and does not buckle. Accordingly, the sub-diaphragm 57 always operates sensitively to high-frequency small-amplitude vibration.

[0007]

However, in the liquid-filled mount having the above-mentioned structure, a rigid sub-diaphragm plate 58 is bonded (vulcanized) to the tip of a sub-diaphragm 57 integrally formed with the elastic body 52. To be
There is a problem that the number of parts is large and vulcanization moldability is not good. Therefore, the present invention has been devised to reduce the number of parts and improve the vulcanization moldability of the liquid-filled mount shown in FIG.

[0008]

In order to achieve the above object, according to the present invention, a rigid member on an outer peripheral side is connected to an outer peripheral side of a rigid member on an inner peripheral side via an elastic body, and the rigidity on the inner peripheral side is increased. A member and the outer peripheral side rigid member are connected via a diaphragm, and a liquid chamber surrounded by the inner peripheral side rigid member, the elastic body, the outer peripheral side rigid member and the diaphragm is provided, and the liquid chamber is provided inside the liquid chamber. An orifice plate is provided on the inner peripheral side of the outer peripheral rigid member, a sub-diaphragm is integrally formed with the diaphragm, the sub-diaphragm is brought into contact with the orifice plate, and the liquid chamber is divided into two chambers by the orifice plate and the sub-diaphragm. partition,
The orifice plate is provided with an orifice passage connecting the two chambers to each other, and the liquid chamber is filled with a hydraulic fluid.

[0009]

In the liquid-filled mount of the present invention, the sub-diaphragm is formed integrally with the diaphragm instead of the elastic body, and the sub-diaphragm is in direct contact with the orifice plate. Therefore, the sub-diaphragm plate can be omitted from the liquid-filled mount of FIG. 3 and the number of parts can be reduced accordingly. Since there is no need to attach the sub-diaphragm plate to the tip of the sub-diaphragm, vulcanization moldability is improved. Can be improved.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

As shown in FIG. 1, an annular boss 2 is provided integrally or separately (in the figure, integrally) on the outer circumference of a rigid member 1 on the inner circumference, which has a cylindrical shape or a cylindrical shape (a cylindrical shape in the figure). An outer peripheral rigid member 4 having a cylindrical shape is connected to the outer peripheral side of the boss 2 via an annular elastic body 3. The elastic body 3 is a rubber material, and is vulcanized and bonded to each of the boss 2 and the rigid member 4 on the outer peripheral side. The rigid member 1 on the inner peripheral side and the rigid member 4 on the outer peripheral side are connected via a diaphragm 5 in the upper and lower parts in the figure. The diaphragm 5 is a rubber material, and is vulcanized and bonded to the inner sleeve 6 and the outer sleeve 7, respectively, and fixes the inner sleeve 6 to the inner peripheral rigid member 1 and fixes the outer sleeve 7 to the outer peripheral rigid member 4. As a result, the rigid member 1 on the inner peripheral side and the rigid member 4 on the outer peripheral side are interposed. An airtight liquid chamber 8 is provided inside the mount with the above members.

Inside the liquid chamber 8, an annular orifice plate 9 is fixed to the inner peripheral side of the rigid member 4 on the outer peripheral side,
An annular sub-diaphragm 10 is attached to the flexible portion of the diaphragm 5.
Are integrally molded toward the orifice plate 9,
The sub-diaphragm 10 is in contact with the orifice plate 9 at its tip. The orifice plate 9 is provided with an annular recess 11 for engaging the tip of the sub-diaphragm 10. The liquid chamber 8 has a first liquid chamber 12 due to the presence of the orifice plate 9 and the sub-diaphragm 10.
And a second liquid chamber 13, and the orifice plate 9 is provided with a spiral orifice flow path 14 that connects the two chambers 12 and 13 to each other. The liquid chamber 8 is filled with a working fluid 15.

The liquid-filled mount having the above configuration is
One of the inner rigid member 1 and the outer rigid member 4 is connected to the supporting member side and the other is connected to the supported member side, and operates as follows. The operation is different between the case where the input vibration is a low frequency and large amplitude vibration and the case where the input vibration is a high frequency small amplitude vibration. The vibration is input in a substantially vertical direction in the figure. A) When the input vibration is a low-frequency large-amplitude vibration When the vibration is input, the rigid member 1 on the inner peripheral side and the rigid member 4 on the outer peripheral side are relatively displaced, and the elastic body 3 is elastically deformed. The hydraulic fluid 15 moves from one of the two chambers 12 and 13 to the other through the orifice flow path 14 due to the pumping action due to the elastic deformation of the two chambers 12, and the vibration is absorbed and attenuated by the flow resistance generated during the passage. B) When the input vibration is a high-frequency small-amplitude vibration When the vibration is input, the rigid member 1 on the inner peripheral side is set in the same manner as in the section A.
The rigid member 4 on the outer peripheral side is relatively displaced and the elastic body 3 is elastically deformed. However, since the elastic deformation amount is small, the vibration is absorbed and attenuated only by the resonance of the sub-diaphragm 10. That is, the spring constant is switched to a lower value.

In the liquid-filled mount having the above structure, the sub-diaphragm 10 is formed integrally with the diaphragm 5 instead of the elastic body 3 and the sub-diaphragm 10 is in direct contact with the orifice plate 9. Therefore, the sub-diaphragm plate can be omitted from the liquid-filled mount shown in FIG. 3 and the number of parts can be reduced accordingly, and it is not necessary to attach the sub-diaphragm plate to the tip of the sub-diaphragm 10. Vulcanization moldability can be improved.

Further, since the sub-diaphragm 10 is formed integrally with the diaphragm 5 having great flexibility,
At the time of vibration input, the sub-diaphragm 10 is not strongly pressed against the orifice plate 9 and does not buckle. Therefore, the sub-diaphragm 10 always operates sensitively to high-frequency small-amplitude vibration. That is, the displacement of the rigid member 1 on the inner peripheral side and the rigid member 4 on the outer peripheral side is absorbed by the diaphragm 5 and is not propagated to the sub-diaphragm 10.
It is possible to sufficiently cancel the small pressure difference generated between the pressures 2 and 13.

[0016]

[Effects of the Invention] The present invention has the following effects. In other words, as in the conventional example, when the input vibration is a high-frequency small-amplitude vibration, the vibration-proofing effect is excellent, but the number of parts can be reduced because the sub-diaphragm plate can be omitted from the configuration. In addition, since it is not necessary to bond the sub-diaphragm plate to the tip of the sub-diaphragm, vulcanization moldability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a liquid-filled mount according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a liquid-filled mount according to a conventional example.

FIG. 3 is a cross-sectional view of a liquid-filled mount according to another conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 inner rigid member 2 boss 3 elastic member 4 outer rigid member 5 diaphragm 6 inner sleeve 7 outer sleeve 8 liquid chamber 9 orifice plate 10 sub-diaphragm 11 recess 12 first liquid chamber 13 second liquid chamber 14 orifice flow Road 15 hydraulic fluid

Claims (1)

(57) [Scope of request for utility model registration] 1. A rigid member (4) on an outer peripheral side is connected to an outer peripheral side of a rigid member (1) on an inner peripheral side via an elastic body (3), and the rigid member (1) on the inner peripheral side is connected to the rigid member (1) on the inner peripheral side. The outer peripheral side rigid member (4) is connected via a diaphragm (5), and the inner peripheral side rigid member (1), the elastic body (3), the outer peripheral side rigid member (4) and the diaphragm (5) are connected. An orifice plate (9) is provided inside the liquid chamber (8) on the inner peripheral side of the outer rigid member (4), and a sub-diaphragm is provided on the diaphragm (5). (10) is integrally molded, and the sub-diaphragm (1) is formed.
0) is brought into contact with the orifice plate (9), the liquid chamber (8) is partitioned into two chambers (12) and (13) by the orifice plate (9) and the sub-diaphragm (10), and the orifice plate (9) is separated. The two rooms (1
2) Orifice flow path (14) communicating (13) with each other
And a liquid-filled mount in which the liquid chamber (8) is filled with a working liquid (15).