JPH109330A - Liquid sealing type vibration-isolating device and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid sealing type vibration-isolating device and its manufacturing method which can reduce the assembly manhours and can be manufactured at a low cost, in the liquid sealing type vibration-isolating device which consists of the upper and the lower metal fittings, a vibration isolating base body consisting of a rubber elastic body to combine both metal fittings, a diaphragm provided opposite to the vibration-isolating base body and forming a liquid chamber on the upper side while forming an air chamber on the lower side, and a partitioning member to partition the liquid chamber into two chambers communicating through an orifice. SOLUTION: A vibration-isolating base body 16 is provided in a stopper metal fitting 40 abutted along the full periphery of the full peripheral stopper 28 of an upper side installing metal fitting 12, and after a diaphragm 22 is installed tentatively in a liquid tank, the height of the liquid level is regulated to expose a space to be an air chamber 20 in the air, so as to cover a lower side installing metal fitting 14. After that, the lower side installed metal fitting 14 is calking fastened by the outer peripheral flange 44 of the stopper metal fitting 40 together with the diaphragm 22, and the sealing of a liquid chamber 18, and the installing of the stopper metal fitting 40 are carried out simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filled type vibration damping device mainly used for supporting a vibration generator such as an automobile engine in a vibration-proof manner, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A liquid-filled type vibration damping device such as a mount for supporting a vibration generator such as an automobile engine so that the vibration is not transmitted to a vehicle body is disclosed in, for example, Japanese Patent Laid-Open No. A liquid-filled anti-vibration mount 100 described in JP-A-307487 is known.

In this liquid-filled anti-vibration mount 100, an upper mounting bracket 101 and a lower mounting bracket 102 fastened to the vibration generator side and the vehicle body S side are connected via a vibration-isolating base 103 made of a rubber elastic body. A diaphragm 104 is disposed facing the vibration-proof base 103, a liquid chamber 105 is formed above the diaphragm 104, and an air chamber 106 is formed below the diaphragm 104. Further, a partition member 107 is formed facing the vibration-proof base 103. Liquid chamber 105
Chambers 105a, 10
5b.

The anti-vibration mount 100 has a stopper mechanism for preventing the anti-vibration base 103 from being deformed beyond a certain limit. That is, the upper mounting bracket 10
1, a stopper portion 1 that protrudes outward over the entire circumference thereof.
09 is provided, and a stopper fitting 110 is provided which can abut against the stopper 109 over the entire circumference from above. When a large upward displacement of the upper mounting fitting 101 due to vibration occurs, the stopper 109 is provided. By contacting the stopper fitting 110, the vibration isolating base 103 is prevented from being deformed beyond a certain level.

In this anti-vibration mount 100, the liquid chamber 105 in which the liquid is sealed is sealed by the lower opening edge of the lower mounting bracket 102 by the diaphragm 104 and the bowl-shaped cover 111 forming the air chamber 106. This is done by caulking. On the other hand, when the stopper fitting 110 is attached, the stopper fitting 110 is welded to a flange at the upper end of the lower attachment fitting 102.

[0006]

However, as described above, when the caulking portion for filling the liquid and the welding portion for attaching the stopper fitting are separately provided, the man-hour for assembling the vibration isolator is increased. In addition, there is a problem that the manufacturing cost is high.

Therefore, the present invention requires a small number of assembly steps,
It is an object of the present invention to provide a liquid-filled type vibration damping device that can be manufactured at low cost and a method of manufacturing the same.

[0008]

According to the present invention, there is provided a liquid filled type vibration damping device comprising: an upper mounting member; a lower mounting member having a bowl shape; A diaphragm disposed opposite to the vibration-proof substrate, forming a liquid chamber with the vibration-proof substrate, and forming an air chamber with the lower mounting bracket; and communicating the liquid chamber with an orifice.
In a liquid filled type vibration damping device comprising a partition member for partitioning into a chamber, a stopper portion is provided on the upper mounting bracket so as to protrude outward over the entire circumference, and the upper mounting bracket can be brought into contact with the stopper from above over the entire circumference. A stopper is provided which regulates a large displacement of the vibration-proof base, and the stopper has a tubular body surrounding the outer periphery of the vibration-proof base, and the stopper is provided at a lower opening edge of the cylindrical body. The upper opening edge of the lower mounting bracket is swaged together with the diaphragm to secure the liquid chamber.

As described above, the stopper structure and the liquid sealing structure over the entire circumference of the vibration isolating base are performed by caulking and fastening the diaphragm and the lower mounting bracket at the lower opening edge of the stopper bracket. Since the mounting of the stopper around the entire circumference and the liquid filling are performed simultaneously by one caulking portion, the number of assembling steps is small, and the manufacturing cost is low.

In manufacturing such a liquid filled type vibration damping device, the vibration damping base attached to the upper mounting bracket is arranged in the stopper bracket, and the diaphragm is mounted on the stopper bracket in the liquid tank. Temporarily mounting, after the temporary mounting, lower the liquid level of the liquid tank or raise the temporarily mounted temporary mounting body until the space serving as the air chamber is exposed from the liquid to the air, and the temporary mounting is performed. It is preferable to cover the lower body with the lower mounting bracket from above, and then to perform the above-described caulking.

According to this manufacturing method, the structure in which the mounting of the stopper around the entire circumference and the sealing of the liquid are simultaneously performed by the single caulking portion is achieved by allowing the liquid to remain in the air chamber by adjusting the liquid level once. No, it can be assembled. This makes it possible to easily and inexpensively manufacture a liquid filled type vibration damping device having a stopper function over the entire circumference. Further, by adjusting the height of the liquid surface, it is possible to easily assemble a product in which the caulked portion and the air chamber are separated from each other, so that the degree of freedom in designing the apparatus is high.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a liquid-filled type vibration damping device 10 according to one embodiment, and FIG. 2 is an exploded longitudinal sectional view thereof.

The vibration isolator 10 includes an upper mounting bracket 12 mounted on a vibration generator such as an automobile engine and a lower mounting bracket 1 mounted on a support side of a vehicle body such as a chassis.
4, a vibration isolating base 16 made of a rubber elastic body that elastically couples the two, and disposed opposite to the vibration isolating base 16 to form a liquid chamber 18 between the vibration isolating base 16 and the lower. It comprises a diaphragm 22 that forms an air chamber 20 with the side mounting bracket 14, and a partition member 26 that partitions the liquid chamber 18 into two upper and lower chambers 18a and 18b that are communicated by an orifice 24.

As shown in the drawing, the upper mounting member 12 has a substantially coma shape, and has a stopper portion 28 which protrudes outward over the entire circumference at a central portion in the axial direction. And it is embedded in the upper part of the vibration isolating base 16 by vulcanization molding means. A mounting bolt 30 is inserted and fixed to the upper mounting bracket 12 at a slight inclination in the axial direction from above. Note that the stopper portion 28 is covered with rubber connected to the vibration-proof base 16.

The lower mounting member 14 has a bowl shape, the upper opening edge of which is expanded to form a flange, and mounting bolts 32, 32 project downward from the bottom. Further, the diaphragm 22 and the partition member 26 are housed therein, and the liquid chamber 18 and the air chamber 20 are formed.

The vibration-proof base 16 has a substantially umbrella shape, and a ring-shaped auxiliary metal fitting 34 disposed on a flange at the upper end of the lower mounting metal fitting 14 is attached to the lower end thereof by vulcanization molding means. I have.

The diaphragm 22 is formed of a circular rubber film disposed on the inner peripheral surface of the lower mounting member 14, and the lower air chamber 2
It is configured to swell to zero. This diaphragm 22
Is formed integrally with a cylindrical metal fitting 36 covered with rubber, and this cylindrical metal fitting 36 is fitted to the inner peripheral surface of the lower mounting metal 14. The cylindrical fitting 36 has an upper end expanded to form a flange, and this flange is disposed on a flange at the upper end of the lower mounting fitting 14, and the lower end is bent inward, and the bent portion has the circular shape. The rubber film is formed continuously.

The partition member 26 is a flat bottomed cylindrical member formed by pressing a steel plate, and is fitted on the inner peripheral surface of the cylindrical fitting 36 of the diaphragm 22. The upper end of the partition member 26 is expanded to form a flange, and the flange is arranged on the flange at the upper end of the cylindrical fitting 36. A concave portion for forming the orifice 24 is formed on the outer peripheral surface of the partition member 26. The partition member 26 is provided with a communication port 38 that communicates the upper and lower chambers.

Reference numeral 40 denotes a stopper 2 of the upper mounting member 12.
8 is a stopper fitting that is provided so as to be able to abut on the entire circumference from above the stopper 8 and restricts a large displacement of the vibration isolating base 16. The stopper fitting 40 has a cylindrical body 40a surrounding the outer periphery of the vibration isolating base 16, and an inner flange 42 for a stopper bent and extended inward is provided on an upper end of the cylindrical body 40a. Is provided. When the upper mounting bracket 12 is largely displaced upward due to vibration, the stopper portion 28
But, it comes into contact with the inner flange 42 over the entire circumference. The upper part of the upper mounting bracket 12 passes through the inside of the inner flange 42.

As shown in FIG. 2, an outer peripheral flange 44 is provided at the lower opening edge of the cylindrical body 40a of the stopper fitting 40, which is expanded outward and bent downward. As shown in FIG. 1, inside this outer peripheral flange 44,
The flange at the upper end of the lower mounting bracket 14 is inserted together with the peripheral parts of the auxiliary fitting 34, the partition member 26, and the diaphragm 22 of the vibration-proof base 16, and the caulking is fastened so as to enclose them. As a result, the diaphragm 22 and the partition member 26 are fixed to the vibration-proof base 16 and the lower mounting member 14 in a sealed state, the liquid chamber 18 and the air chamber 20 are sealed, and the stopper member 40 is connected to the lower side. A case body that is attached to the mounting bracket 14 and houses the vibration-proof base 16, the liquid chamber 18, and the air chamber 20 is configured.

An upper stopper member 46 is fixed to the upper surface of the upper mounting member 12 by means such as screw fastening.
A rubber cover whose outer peripheral portion extends downward in the axial direction in a skirt shape is attached to the outer peripheral end of a substantially circular metal plate having a hole through which the mounting bolt 30 penetrates. And
At the time of large downward displacement of the upper mounting bracket 12 due to vibration,
The stopper fitting 40 comes into contact with the upper surface of the inner flange 42.

In the use state of the liquid-filled type vibration damping device 10 having the above-described structure, deformation of the vibration damping base 16 due to vibration of the engine or the like and a change in the volume of the two liquid chambers 18a and 18b cause
The liquid inside flows through the orifice 24, the low frequency vibration is absorbed and attenuated by the flow resistance of the vibration isolating base 16 and the orifice 24 and the viscosity of the liquid, and the high frequency vibration is caused by the resonance action of the vibration isolating base 16 and the liquid itself. Absorbed to reduce vibration.

At this time, when the displacement amount of the vibration of the upper mounting member 12 is large, for example, when the displacement is large upward, the stopper portion 28 of the upper mounting member 12 comes into contact with the inner flange 42 of the stopper member 40 so that The above displacement is regulated. At the time of a large downward displacement, the upper stopper member 46 provided on the upper surface of the upper mounting member 12 is
To prevent further displacement.

Next, a method of manufacturing the vibration isolator 10 will be described.

First, the anti-vibration base 16 attached to the upper mounting bracket 12 is positioned and inserted into the stopper fitting 40 in the circumferential direction, and is inserted into the liquid chamber 18 as shown in FIG. In the liquid tank 50 filled with the liquid 52 to be filled, the lower opening edge of the stopper fitting 40, that is, the outer peripheral flange 44 is installed in a posture facing upward. Here, the auxiliary fitting 34 of the vibration-proof base 16 is disposed inside the outer peripheral flange 44 in a state of being in contact with the horizontal step surface 44 a of the flange 44.

Similarly, in the liquid tank 50, the partition member 26 is temporarily press-fitted into the diaphragm 22 from which air has been removed.

As shown in FIG. 4, in the liquid tank 50,
The diaphragm 22 into which the partition member 26 is press-fitted is temporarily mounted on the stopper fitting 40 with its circular rubber film side facing upward. At this time, both flanges of the diaphragm 22 and the partition member 26 are inserted into the outer peripheral flange 44 of the stopper fitting 40.

As shown in FIG. 5, the temporary mounting body is raised until the space above the diaphragm 22 forming the air chamber 20 is exposed from the liquid 52 in the liquid tank 50 to the air. As shown in the figure, the lower mounting bracket 14 is covered from above. At this time, the outer peripheral flange 44 of the stopper fitting 40 corresponding to the caulking portion is disposed in the liquid 52, that is, below the liquid surface 54, and the flange of the lower mounting fitting 14 is placed inside the outer peripheral flange 44 of the stopper fitting 40. Be charged.

Finally, the auxiliary fitting 34 is removed from the liquid tank 50 and is
Partition member 26, diaphragm 22, and lower mounting bracket 14
And caulking the periphery.

In the above, instead of raising the temporarily mounted body, the liquid level 54 of the liquid tank 50 is changed until the space above the diaphragm 22 forming the air chamber 20 is exposed from the liquid 52 in the liquid tank 50 to the air. May be lowered. Also in this case, it is preferable to cover the lower mounting member 14 with the outer peripheral flange 44 serving as the caulking portion disposed in the liquid 52 from the viewpoint of preventing air from entering the liquid chamber 18.

In the above description, the stopper fitting 40
The vibration isolating substrate 16 may be charged in the liquid tank 50. In the above, the caulking may be performed in the liquid tank 50.

As described above, in the liquid filling type vibration damping device 10 of the present embodiment, the entire stopper structure and the liquid filling structure in the liquid chamber 18 are formed by the outer peripheral flange 44 of the stopper fitting 40.
This is performed by caulking and fastening the vibration isolating base 16, the partition member 26, the diaphragm 22, and the lower mounting member 14. That is, since the mounting of the stopper fitting 40 and the liquid encapsulation are performed simultaneously by one caulking portion, the number of assembling steps is small, and the manufacturing cost is low.

The liquid filled type vibration damping device 10 of the present embodiment
When the air chamber 20 is formed by covering the lower mounting bracket 14, the height of the liquid surface 54 is adjusted.
The liquid 52 does not enter the inside. In addition, since the covered lower mounting member 14 is caulked and fastened by the stopper member 40, the mounting of the stopper member 40, the sealing of the liquid, and the sealing of the air chamber 20 are performed at one time, so that the manufacturing is easy. In this manner, the liquid filling type vibration damping device 10 having the stopper function over the entire circumference by one adjustment of the liquid level 54 is provided.
Can be manufactured simply and at low cost. Also,
By adjusting the height of the liquid surface 54, it is possible to easily assemble the air chamber 20 even when the air chamber 20 is at a position away from the caulking portion as in the present apparatus 10, and thus the degree of freedom in apparatus design is high.

[0035]

According to the liquid filled type vibration damping device of the present invention, the mounting of the stopper fitting having the stopper function over the entire circumference and the liquid filling are simultaneously performed by one caulking portion, so that the number of assembling steps is reduced. And low manufacturing costs.

Further, according to the manufacturing method of the liquid-filled type vibration damping device of the present invention, the structure in which the mounting portion of the entire-peripheral stopper fitting and the caulking portion of the liquid filling are set at the same position is used. By adjusting the height, it can be manufactured simply and at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid filled type vibration damping device 10 according to an embodiment of the present invention.

FIG. 2 is an exploded sectional view of the liquid filling type vibration damping device 10.

FIG. 3 is a cross-sectional view of the liquid-filled type vibration damping device 10 during manufacture.

FIG. 4 is a cross-sectional view of the liquid-filled vibration damping device 10 during manufacture.

FIG. 5 is a cross-sectional view of the liquid-filled type vibration damping device 10 during manufacture.

FIG. 6 is a cross-sectional view of the liquid-filled vibration damping device 10 during manufacture.

FIG. 7 is a longitudinal sectional view showing an example of a conventional liquid-filled type vibration damping device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 liquid-filled vibration isolator 12 upper mounting bracket 14 lower mounting bracket 16 vibration-proof base 18 liquid chamber 20 air chamber 22 diaphragm 24 orifice 26 partition member 28 stopper section 40 stopper bracket 44 outer peripheral flange 50 liquid tank 52 liquid 54 liquid surface

Claims (2)

[Claims] An upper mounting bracket, a lower mounting bracket in the shape of a bowl, a vibration-isolating base made of a rubber elastic body connecting the both, and
A diaphragm arranged opposite to the vibration-proof substrate, forming a liquid chamber between the vibration-proof substrate and the lower mounting bracket, and communicating with the liquid chamber through an orifice; A liquid-filled vibration isolator comprising a partition member which is provided with a partition member that projects outwardly over the entire circumference of the upper mounting bracket, and is disposed so as to be capable of abutting the stopper portion from above over the entire circumference. A stopper fitting for restricting a large displacement of the vibration isolating base, the stopper fitting having a cylindrical body surrounding the outer periphery of the vibration isolating base, and the diaphragm being formed at a lower opening edge of the cylindrical body. A liquid filling type vibration damping device, wherein an upper opening edge of the lower mounting bracket is swaged and fastened to seal the liquid chamber. 2. The method for manufacturing a liquid-filled type vibration damping device according to claim 1, wherein the vibration-damping base attached to the upper mounting member is disposed in the stopper member, and is disposed in a liquid tank. The diaphragm is temporarily mounted on the stopper fitting, and after the provisional mounting, the liquid level of the liquid tank is lowered or the temporarily mounted temporary mounting is performed until the space serving as the air chamber is exposed from the liquid to the air. A method of manufacturing a liquid filled type vibration damping device, comprising raising the body, covering the temporary mounting body with the lower mounting bracket from above, and then performing the caulking.