JPH0684042U - Liquid-filled mount - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the number of parts and improve vulcanization moldability while exhibiting excellent vibration damping effect when the input vibration is vibration of high frequency and small amplitude. [Structure] A sub-diaphragm 10 that resonates with respect to high-frequency, small-amplitude vibration is integrally formed with the diaphragm 5, and the sub-diaphragm 10 is brought into contact with the orifice plate 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement in a liquid-filled mount related to vibration isolation technology. The liquid-filled mount of the present invention is mainly used for the vibration-damping support structure of an automobile cabin.

[0002]

[Prior art]

 As shown in FIG. 2, a known liquid-filled mount of this type is designed to absorb and attenuate input vibration by elastic deformation of an elastic body a and flow resistance of a hydraulic fluid c passing through an orifice flow path b. However, this liquid-filled mount has a problem that when the input vibration is vibration of high frequency and small amplitude, this vibration cannot be sufficiently absorbed and damped.

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

That is, the outer peripheral side rigid member 51 is connected to the outer peripheral side through the elastic body 52, and the inner peripheral side rigid member 51 and the outer peripheral side rigid member 53 are connected to the diaphragm 54. Connected through. A liquid chamber 55 is provided surrounded by the rigid member 51 on the inner peripheral side, the elastic body 52, the rigid member 53 on the outer peripheral side, and the diaphragm 54. The liquid chamber 55 is provided inside the liquid chamber 55 on the inner peripheral side of the rigid member 53 on the outer peripheral side. The orifice plate 56 is fixed. The sub-diaphragm 57 is integrally formed with the elastic body 52, the sub-diaphragm plate 58 is adhered (vulcanized) to the tip of the sub-diaphragm 57, and the sub-diaphragm plate 58 slides on the inner peripheral surface of the orifice plate 56. It is in existence. 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 an orifice plate 56 is provided with an orifice flow passage 61 that connects the two chambers 59 and 60 to each other. The liquid chamber 55 is filled with the hydraulic fluid 62.

The liquid-filled mount configured as described above operates as follows depending on whether the input vibration is a low-frequency large-amplitude vibration or a high-frequency small-amplitude vibration. A) When the input vibration is a low-frequency large-amplitude vibration When the vibration is input, the inner peripheral side rigid member 51 and the outer peripheral side rigid member 53 are displaced relative to each other, 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 path 61 by the pumping action due to the elastic deformation of, and the vibration is absorbed and damped by the flow resistance generated at the time of passage. B) When the input vibration is vibration of high frequency and small amplitude When the vibration is input, the rigid member 51 on the inner peripheral side and the rigid member 53 on the outer peripheral side are displaced relative to each other and the elastic body 52 is elastically deformed as in the case of A. However, since the amount of elastic deformation is small, vibration is absorbed and damped only by the resonance of the sub diaphragm 57.

A sub-diaphragm plate 58 is attached 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 buckling does not occur. Therefore, the sub-diaphragm 57 always operates sensitively to the vibration of high frequency and small amplitude.

[0007]

[Problems to be solved by the device]

 However, in the liquid-filled mount configured as described above, since the sub-diaphragm plate 58 made of a rigid material is bonded (vulcanized and bonded) to the tip of the sub-diaphragm 57 integrally formed with the elastic body 52, the number of parts is large, There is a problem that the 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]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, the outer peripheral side rigid member is connected to the outer peripheral side of the inner peripheral side rigid member via an elastic body, and the inner peripheral side rigid member and the outer peripheral side rigid member are connected. Are connected via a diaphragm, and a liquid chamber surrounded by the rigid member on the inner peripheral side, the elastic body, the rigid member on the outer peripheral side, and the diaphragm is provided, and inside the liquid chamber, the inside of the rigid member on the outer peripheral side is provided. An orifice plate is provided on the peripheral side, a sub-diaphragm is integrally formed on the diaphragm, the sub-diaphragm is brought into contact with the orifice plate, and the liquid chamber is partitioned into two chambers by the orifice plate and the sub-diaphragm. The plate is provided with an orifice flow passage that connects the two chambers to each other, and the working fluid is filled in the liquid chamber.

[0009]

[Action]

 In the liquid-filled mount of the present invention, the sub-diaphragm is integrally formed 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 by this amount, and since it is not necessary to bond the sub-diaphragm plate to the tip of the sub-diaphragm, the vulcanization moldability Can be improved.

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, an annular boss 2 is integrally or separately provided (integrated in the figure) on the outer peripheral side of a rigid member 1 on the inner peripheral side having a cylindrical shape or a cylindrical shape (cylindrical shape in the figure). A cylindrical rigid member 4 on the outer peripheral side is provided on 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 adhered to each of the boss 2 and the outer peripheral rigid member 4. 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 portions of the figure. The diaphragm 5 is made of rubber and is vulcanized and bonded to the inner sleeve 6 and the outer sleeve 7, respectively, to fix the inner sleeve 6 to the inner rigid member 1 and the outer sleeve 7 to the outer rigid member 4. By being fixed, it is interposed between the rigid member 1 on the inner peripheral side and the rigid member 4 on the outer peripheral side. 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, and an annular sub-diaphragm 10 is attached to the orifice plate 9 at the flexible portion of the diaphragm 5. 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 that engages the tip of the sub diaphragm 10. The liquid chamber 8 is partitioned into the first liquid chamber 12 and the second liquid chamber 13 by the presence of the orifice plate 9 and the sub-diaphragm 10. The orifice plate 9 has a spiral orifice flow which connects the two chambers 12 and 13 with each other. A passage 14 is provided. The liquid chamber 8 is filled with the working liquid 15.

In the liquid-filled mount having the above structure, one of the inner peripheral side rigid member 1 and the outer peripheral side rigid member 4 is connected to the support body side, and the other is connected to the supported body side. Works like. The operation differs depending on whether the input vibration is a low-frequency, large-amplitude vibration or a high-frequency, small-amplitude vibration. In addition, the vibration is input in the upper and lower directions 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 displaced relative to each other, 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 by the pumping action due to the elastic deformation, and the vibration is absorbed and damped by the flow resistance generated when the hydraulic fluid 15 passes therethrough. B) When the input vibration is a vibration of high frequency and small amplitude When the vibration is input, the rigid member 1 on the inner circumference side and the rigid member 4 on the outer circumference side are displaced relative to each other and the elastic body 3 is elastically deformed, as in the case of the item A. However, since the amount of elastic deformation is small, the vibration is absorbed and damped only by the resonance of the sub diaphragm 10. That is, the spring constant is switched to a low value.

In the liquid-filled mount having the above structure, the sub-diaphragm 10 is integrally formed not with the elastic body 3 but with the diaphragm 5, 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 by this amount, and at the same time, it is not necessary to bond the sub-diaphragm plate to the tip of the sub-diaphragm 10. In addition, the vulcanization moldability can be improved.

Further, since the sub-diaphragm 10 is integrally formed with the diaphragm 5 having large flexibility, the sub-diaphragm 10 is not strongly pressed against the orifice plate 9 at the time of vibration input, and is not buckled. Therefore, the sub-diaphragm 10 always operates sensitively to high frequency and small amplitude vibration. That is, the displacements of the rigid member 1 on the inner peripheral side and the rigid member 4 on the outer peripheral side are absorbed by the diaphragm 5 and are not propagated to the sub-diaphragm 10. This sub-diaphragm 10 causes the displacement between the liquid chambers 12 and 13. It is possible to sufficiently cancel the small pressure difference that occurs.

[0016]

[Effect of device]

 The present invention has the following effects. That is, as in the conventional example, when the input vibration is vibration of high frequency and small amplitude, it exhibits excellent vibration damping effect, but since the sub diaphragm plate can be omitted from the configuration, the number of parts is reduced. In addition, since it is not necessary to bond the sub-diaphragm plate to the tip of the sub-diaphragm, the vulcanization moldability can be improved.

[Brief description of drawings]

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

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

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

[Explanation of symbols]

 1 Inner peripheral side rigid member 2 Boss 3 Elastic body 4 Outer peripheral side 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 Channel 15 hydraulic fluid

Claims (1)

[Scope of utility model registration request] 1. A rigid member (4) on the outer peripheral side is connected to an outer peripheral side of the rigid member (1) on the 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). The outer peripheral side rigid member (4) is connected via a diaphragm (5), and the inner peripheral side rigid member (1), elastic body (3), outer peripheral side rigid member (4) and diaphragm (5) are connected. An enclosed liquid chamber (8) is provided, an orifice plate (9) is provided inside the liquid chamber (8) on the inner peripheral side of the rigid member (4) on the outer peripheral side, and the diaphragm (5) is provided with a sub-diaphragm. (10) is integrally molded, and the sub diaphragm (1
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) In the two rooms (1
2) Orifice flow path (14) that connects (13) with each other
And a liquid-filled mount in which the liquid chamber (8) is filled with a working fluid (15).