JP2572377Y2 - 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 As shown in FIG. 3, a known liquid-filled mount of this type absorbs and attenuates input vibration due to elastic deformation of an elastic body a and flow resistance of a hydraulic fluid c passing through an orifice passage b. (Japanese Patent Laid-Open No. 64-35 / 1988)
No. 138).

[0003]

However, the liquid-filled mount has the following problems. When the input vibration is a high-frequency small-amplitude vibration, the vibration cannot be sufficiently absorbed and attenuated. Since the hydraulic fluid c flows only by the pumping action due to the elastic deformation of the elastic body a, the pumping effect is small. The diaphragm d only deforms passively as a result of the flow of the hydraulic fluid c.

[0004]

SUMMARY OF THE INVENTION In view of the above, the present invention has been devised in order to solve the above-mentioned problems in the prior art. Thus, a boss is provided on the outer peripheral side of the inner rigid member,
A rigid member on the outer peripheral side is connected to the outer peripheral side of the boss via an elastic body, the rigid member on the inner peripheral side and the rigid member on the outer peripheral side are connected via a diaphragm, the rigid member on the inner peripheral side, A liquid chamber surrounded by a boss, an elastic body, a rigid member on the outer peripheral side and a diaphragm is provided, and an orifice plate is provided on the inner peripheral side of the rigid member on the outer peripheral side inside the liquid chamber, and the boss is directed toward the diaphragm. A sub-diaphragm, a sub-diaphragm plate provided at the tip of the sub-diaphragm, the sub-diaphragm plate slidably with respect to the inner peripheral surface of the orifice plate, and the liquid chamber with the orifice plate, the sub-diaphragm and the sub-diaphragm. An orifice flow path partitioned into two chambers by a diaphragm plate and communicating the two chambers with each other through the orifice plate Provided, to provide a liquid-sealed mounting filled with hydraulic fluid to said fluid chamber.

According to a second aspect of the present invention, in the liquid-filled mount according to the first aspect, an inner sleeve is provided between the rigid member on the inner peripheral side and the diaphragm to exert a pumping action on the flow of the hydraulic fluid. A liquid-filled mount is provided.

[0006]

The liquid-filled mount according to the first aspect operates as follows when the input vibration is a low-frequency, large-amplitude vibration and a high-frequency, small-amplitude vibration. A) When the input vibration is a vibration of low frequency and large amplitude When the vibration is input, the rigid member on the inner peripheral side and the rigid member on the outer peripheral side are relatively displaced and the elastic body is elastically deformed. The hydraulic fluid moves from one of the two chambers to the other through the orifice channel by the pump action, 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 on the inner peripheral side and the rigid member on the outer peripheral side are displaced relative to each other as in the case of the item A, and the elastic body is elastically deformed. Since the amount of deformation is small, the vibration is absorbed and attenuated only by the resonance of the sub-diaphragm.

The sub-diaphragm is provided with a sub-diaphragm plate at the end thereof, and the sub-diaphragm plate is slidable with respect to the inner peripheral surface of the orifice plate. There is no buckling.

In the liquid-filled mount according to the second aspect, not only the elastic body but also the inner sleeve exerts a pump action on the flow of the hydraulic fluid.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

As shown in FIG. 1, an annular boss 2 is fixed to the outer peripheral side of an inner peripheral rigid member 1 having a cylindrical shape or a cylindrical shape (cylindrical shape in the figure). Rigid member 4 on the outer peripheral side having a cylindrical shape via elastic body 3
Is connected. The inner peripheral side rigid member 1 and the boss 2 may be an integral body. The elastic body 3 is a rubber material, and the boss 2
It is vulcanized and bonded to each of the rigid members 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 made of a rubber material and has an inner sleeve 6.
And the outer sleeve 7 are respectively vulcanized and adhered, and the inner sleeve 6 is fixed to the inner rigid member 1 and the outer sleeve 7 is fixed to the outer rigid member 4 so that the inner rigid member 1 and the outer rigid member 4 are fixed. Side rigid member 4
It is interposed between. 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 fixed to the boss 2 toward the diaphragm 5. The sub-diaphragm 10 is a rubber material, is vulcanized and bonded to the boss 2, and is formed integrally with the elastic body 3 or separately (in the figure, integrally). An annular sub-diaphragm plate 1 is attached to the tip of the sub-diaphragm 10
The sub-diaphragm plate 11 is slidable with respect to the inner peripheral surface of the orifice plate 9. The liquid chamber 8 is partitioned into a first liquid chamber 12 and a second liquid chamber 13 by the presence of an orifice plate 9, a sub-diaphragm 10, and a sub-diaphragm plate 11, and a spiral that connects the two chambers 12, 13 to the orifice plate 9 mutually. An orifice flow path 14 is provided. 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 and the other is connected to the supported member, 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 8 moves from one of the two chambers 12 and 13 to the other through the orifice flow path 14 by a pumping action due to elastic deformation of the two chambers 12, and the vibration is absorbed and attenuated by flow resistance generated at the time of 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 elastic member 3 is elastically deformed by the relative displacement of the rigid member 4 on the outer peripheral side and the elastic member 3. 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 low value.

In the above operation, the sub-diaphragm plate 11 is not fixed to the tip of the sub-diaphragm 10, and the tip of the sub-diaphragm 10 is in contact with the end face (the upper end face in the figure) of the orifice plate 9. In this case, when vibration is input, the sub-diaphragm 10 is pressed against the orifice plate 9 and buckles, which may cause inconvenience such as an abnormal increase in the spring constant of the sub-diaphragm 10. However, according to the structure of FIG.
The sub-diaphragm plate 11 is provided at the tip of the sub-diaphragm 11 and the sub-diaphragm plate 11 is slidable with respect to the inner peripheral surface of the orifice plate 9. 10 does not buckle by being pressed against the orifice plate 9, and the spring constant of the sub-diaphragm 10 does not increase. Therefore, according to the structure, the sub-diaphragm 1 is not affected by high-frequency small-amplitude vibration.
0 always resonates sensitively, and this vibration can be sufficiently absorbed and attenuated.

FIG. 2 shows a second embodiment of the present invention, which differs from the first embodiment in the following points. That is,
The width w in the radial direction of the inner sleeve 6 for fixing the diaphragm 5 to the rigid member 1 on the inner peripheral side is set to be larger than that in the case of FIG. 1, and this inner sleeve 6 is active against the flow of the hydraulic fluid 15 at the time of vibration input. Acts as a pump. Therefore, according to this structure, since both the elastic body 3 and the inner sleeve 6 exert a pumping action on the flow of the working fluid 15 from above and below, the pumping effect is large, and the pumping action is large against low frequency and large amplitude input vibration. Demonstrate great anti-vibration effect. still,
Since the radial width of the diaphragm 5 becomes smaller as the radial width of the inner sleeve 6 is increased,
The cross-sectional shape of the diaphragm 5 is corrugated so that the diaphragm 5 can follow the relative displacement between the inner rigid member 1 and the outer rigid member 4.

[0015]

[Effects of the Invention] The present invention has the following effects. That is,
A sub-diaphragm that resonates with high-frequency, small-amplitude vibration provides excellent vibration-proofing effects not only when the input vibration is low-frequency, large-amplitude vibration, but also when high-frequency, small-amplitude vibration. I do. Also, because the sub-diaphragm is configured to prevent buckling, the sub-diaphragm always resonates with high-frequency small-amplitude vibration,
From this aspect, it also has an excellent anti-vibration effect. When an inner sleeve that exerts a pump action on the flow of the hydraulic fluid is provided between the rigid member on the inner peripheral side and the diaphragm,
The pump effect is large, and it exerts a large vibration-proof effect against input vibration with low frequency and large amplitude.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of a liquid-filled mount according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a liquid-filled mount according to a 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 sub-diaphragm plate 12 first liquid chamber 13 second liquid chamber 14 Orifice passage 15 Hydraulic fluid

Claims (2)

(57) [Scope of request for utility model registration] 1. A boss (2) is provided on an outer peripheral side of an inner peripheral rigid member (1), and an elastic body (3) is provided on an outer peripheral side of the boss (2).
The rigid member (4) on the outer peripheral side is connected via the inner peripheral side, and 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). A liquid chamber (8) surrounded by a rigid member (1), a boss (2), an elastic body (3), a rigid member (4) on the outer peripheral side, and a diaphragm (5). An orifice plate (9) is provided on the inner peripheral side of the rigid member (4) on the outer peripheral side, a sub-diaphragm (10) is provided on the boss (2) toward the diaphragm (5), and the sub-diaphragm ( A sub-diaphragm plate (11) is provided at the tip of 10), the sub-diaphragm plate (11) is slidable with respect to the inner peripheral surface of the orifice plate (9), and the liquid chamber (8) is connected to the orifice plate. (9), sub diaf Beam (10) and the sub diaphragm plate (11) by two-chamber (12) (1
The orifice plate (9) is provided with an orifice flow path (14) for communicating the two chambers (12) and (13) with each other, and the liquid chamber (8) is filled with a working fluid (15). Enclosure mount. 2. The liquid-filled mount according to claim 1, wherein an inner sleeve (5) between the rigid member (1) on the inner peripheral side and the diaphragm (5) has a pumping action on the flow of the hydraulic fluid (15). 6) A liquid-filled mount characterized by the provision of 6).