JP3638633B2 - Liquid filled anti-vibration mount - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a liquid-filled vibration-proof mount that can be mounted and used on an automobile engine support or the like to effectively absorb vibration, and in particular, improved vibration-proof characteristics in a high frequency range with a simple structure. The present invention relates to a liquid-filled vibration-proof mount that can be advantageously achieved.
[0002]
[Prior art]
As a liquid-filled vibration-proof mount as described above, the elasticity of the elastic body and the set fluid resistance value of the orifice on the outer periphery of the partition plate remain the same, and a flat plate that further divides the small liquid chamber with a gap on the outer periphery There is known a mount that can more effectively reduce the dynamic spring constant in a high-frequency frequency range of 100 Hz or more simply by providing a parallel to the partition plate.
[0003]
[Problems to be solved by the invention]
However, since the conventional liquid-filled vibration-proof mount uses a rigid flat plate, it interferes with other parts due to space problems during assembly, and interferes with other parts after assembly. As a result, the durability was also adversely affected.
[0004]
[Means for Solving the Problems]
The liquid-filled vibration-proof mount of the present invention has been invented in view of these circumstances. That is, the inner cylinder fitting is accommodated in the cylindrical support fitting, and the inner cylinder fitting and the cylindrical support fitting are connected by a rubber elastic body, while being supported by the cylindrical support fitting, A part of the wall part is composed of the rubber elastic body on one side with a partition plate having an elastic part set on the part, and a pressure receiving chamber in which internal pressure fluctuations are induced upon vibration input is provided on the other side. Each of which is formed of a flexible membrane to form an equilibrium chamber in which volume change is allowed, and a predetermined incompressible fluid is sealed in the pressure receiving chamber and the equilibrium chamber, and an orifice passage communicating therewith is provided. In the enclosed vibration-proof mount, an elastic body formed into a sheet shape is fixed to the central elastic body of the partition plate with at least one protrusion in the pressure receiving chamber .
[0006]
[Action]
In the liquid-filled vibration-proof mount according to the first aspect of the present invention , since the elastic body formed into a sheet shape is fixed to the elastic portion of the partition plate using the protrusion, the positional relationship with each component It works effectively in a more stable manner, such as clearing and avoiding interference.

[0007]
【Example】
Embodiments will be described below with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a main part of a vibration-proof mount used in the present invention. The anti-vibration mount has a main body portion that includes a vibration-proof base 2 in which one of the cylindrical main body fittings 1, for example, a lower elastic opening made of a rubber elastic body and an inner cylindrical fitting 5 is embedded in the center thereof, as shown in FIG. A diaphragm 3 made of a rubber film is attached to the upper opening in a sealed state, and liquid chambers 4a and 4b are formed inside the main body.
[0008]
The liquid chambers 4a and 4b are divided into a plurality of chambers, for example, a pressure receiving chamber 4a in which fluctuations in internal pressure are generated upon input of vibration as shown in the figure by a partition 6 having an elastic body 8 set at the center thereof, and at least a part of the liquid chambers 4a and 4b. Is defined by the diaphragm 3 so as to be partitioned into an equilibrium chamber 4b in which vibration input is avoided, and both the chambers 4a and 4b are communicated by an orifice 7 provided in the partition body 6.
[0009]
Further, as shown in the pressure receiving chamber 4a, a sheet-like elastic body 9 having a predetermined gap between the chamber walls is provided in a floating state, and 2 above and below the sheet-like elastic body 9 are provided. Two small liquid chambers are formed. For this reason, the sheet constant elastic body is effective in reducing the spring constant in the high frequency frequency range, and there is an advantage that the deformation can be used at the time of assembly.
[0010]
FIG. 2 is a longitudinal sectional view of an essential part of another embodiment of the vibration-proof mount used in the present invention. The anti-vibration mount has a main body portion including one of the cylindrical main body fittings 11, for example, an anti-vibration base 12 made of a rubber elastic body in the lower opening as shown in the figure and embedded with the inner tubular fitting 15 in the center thereof. A diaphragm 13 made of a rubber film is attached to the upper opening in a sealed state, and liquid chambers 14a and 14b are formed inside the main body.
[0011]
The liquid chambers 14a and 14b are divided into a plurality of chambers, for example, a pressure receiving chamber 14a in which fluctuations in internal pressure are generated upon input of vibration as shown in the figure by a partition 16 having an elastic body 18 set in the center thereof, and at least a part thereof. Is defined by the diaphragm 13 and is partitioned into an equilibrium chamber 14b from which vibration input is avoided. Both chambers 14a and 14b are communicated with each other through an orifice 17 provided in the partition body 16.
[0012]
Further, as shown in the pressure receiving chamber 14a, a sheet-like elastic body 19 having a predetermined gap with the chamber wall is fixed to the elastic body 18 with at least one projection 20, and the sheet is Two small liquid chambers are formed above and below the elastic body 19. For this reason, it is effective in reducing the spring constant in the high frequency range, and by fixing the sheet-like elastic body 19, the clearance between the chamber wall and the distance from the elastic body 18 can be easily set. It becomes possible to reduce the spring constant in the desired frequency range.
[0013]
【The invention's effect】
As described above, the liquid-filled vibration-proof mount of the present invention has a simple configuration in which a sheet-like elastic body is disposed in the pressure-receiving chamber, achieves a reduction in the spring constant in the high frequency range, and Simplification of manufacturing man-hours and associated costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of a liquid-filled vibration-proof mount according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a main part of a liquid-filled vibration-proof mount according to another embodiment of the present invention.
[Explanation of symbols]
(1) (11) Body bracket (2) (12) Anti-vibration base (3) (13) Diaphragm (4a) (14a) Pressure receiving chamber (4b) (14b) Equilibrium chamber (5) (15) Inner cylinder (6 (16) Partition (7) (17) Orifice (8) (18) Elastic body (9) (19) Sheet-like elastic body (10) Projection

Claims (1)

The inner cylinder fitting is accommodated and arranged inside the cylindrical support fitting, and the inner cylinder fitting and the cylindrical support fitting are connected by a rubber elastic body, while being supported by the cylindrical support fitting and in the central portion. With a partition plate set with an elastic part in between, a part of the wall part is composed of the rubber elastic body on one side and a pressure receiving chamber in which an internal pressure fluctuation is induced at the time of vibration input, and a part of the wall part is on the other side Liquid-filled type that is formed of a flexible membrane, each of which forms an equilibration chamber in which volume change is allowed, encloses a predetermined incompressible fluid in the pressure receiving chamber and the equilibration chamber, and has a communicating orifice passage An anti-vibration mount comprising: an elastic body formed into a sheet shape, which is fixed in the pressure-receiving chamber and at the central elastic body of the partition plate by at least one protrusion. .

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