JP3543155B2 - Liquid-filled anti-vibration mount - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled anti-vibration mount used to support a vibration generator such as an automobile engine in a vibration-proof manner.
[0002]
[Prior art]
The vibration damping function is carried by the liquid sealed in the variable volume chamber, while the vibration insulation is carried by the vibration-proof base made of rubber elastic material that forms the chamber wall for liquid sealing, and the low-frequency vibration A liquid-filled anti-vibration mount having a large damping coefficient and high insulation properties against high-frequency vibration has been conventionally known, and is disclosed, for example, in Japanese Utility Model Laid-Open No. 5-47576.
[0003]
As shown in FIG. 2, the anti-vibration mount includes a vibration-proof base 21 made of a rubber elastic body attached to an upper opening of a cylindrical main body fitting 20 and a diaphragm 22 attached to a lower opening in a sealed state. A chamber 23 is formed, and the liquid chamber 23 is divided by a partition plate 27 forming an orifice 25 between an outer peripheral groove 24 and an inner surface of the main body fitting 20, while a bowl is formed at a lower end of the main body fitting 20. It has a structure in which an air chamber 26 is formed between a diaphragm 22 and a mounting metal fitting 28 in the form of a circle.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional anti-vibration mount, since the orifice 25 is formed by the groove 24 on the outer periphery of the partition plate 27 and the inner surface of the main body fitting 20, the shape of the partition plate 27 is formed in order to form the groove 24. However, there is a problem that the press forming of the partition plate 27 is difficult and the cost is high.
[0005]
An object of the present invention is to address the above-described situation and to find a new structure for a main body of a vibration-proof mount and a vibration-proof base, thereby simplifying the shape of the partition plate and facilitating press forming thereof. It is assumed that.
[0006]
[Means for Solving the Problems]
That is, the feature of the liquid-filled anti-vibration mount of the present invention that meets the above-mentioned object is that a vibration-isolating base made of a rubber elastic body is provided at the upper opening of the cylindrical main body fitting which is erected as described above, and the rubber is provided at the lower opening. A liquid membrane is formed by attaching the membrane diaphragms in a liquid-tight manner, and the liquid chamber is divided into an upper liquid chamber and a lower liquid chamber by a partition plate. In the liquid-filled anti-vibration mount, which is in communication with each other, the upper part of the cylindrical main body is bent at an acute angle inward, and the bent part is used as a core, and the lower surface is formed inward from the main body. A stepped portion having a protrusion is provided around the vibration-proof base, while a lower end of the main body fitting is attached by caulking a lower end of the main body fitting to a bowl-shaped mounting bracket fixed with bolts. , the partition plate is stepped men by the vibration-isolating base A top plate portion whose outer peripheral portion on the inner peripheral portion is pressed against brought a flow path from the upper fluid chamber portion to the orifice of a tubular portion extending downward from the outer periphery of the top plate portion, A collar portion extending from the lower portion of the cylindrical portion to the inner surface of the main body fitting; and a cylindrical crimping member extending downward from the outer peripheral portion of the upper portion of the collar and being caulked by the main body fitting together with the mounting fitting and the like. parts and is configured to include a flow path to the orifice from the lower side liquid chamber which is formed in the cylindrical portion a step portion lower surface of the orifice by the vibration isolating base body by forming recessed top plate portion in a groove shape And the partition plate and the main body bracket.
There.
[0007]
[Action]
In the anti-vibration mount of the present invention, since the lower surface of the step portion of the anti-vibration base forms a part of the orifice, the shape of the partition plate can be made simple with a substantially convex cross section. Can be easily and at low cost.
[0008]
In addition, the ease of press forming of this partition plate makes it easy to change the shape of the partition plate, which makes it easy to tune the function of the anti-vibration mount, such as changing the size of the cross section of the orifice. It becomes possible.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0010]
FIG. 1 is a cross-sectional view showing a liquid-filled anti-vibration mount according to an embodiment of the present invention. This anti-vibration mount has a vibration-proof base 2 made of a rubber elastic body at an upper opening of an upright cylindrical main body fitting 1. Are bonded by vulcanization, and a diaphragm 3 made of a rubber film is liquid-tightly attached to a lower opening of the main body fitting 1 to form a liquid chamber 4. The liquid chamber 4 is divided into an upper liquid chamber 6 and a lower liquid chamber 7 by a partition plate 5. The upper liquid chamber 6 and the lower liquid chamber 7 communicate with each other via an annular orifice 8. Matching.
[0011]
A bowl-shaped mounting member 9 to which a bolt is fixed is attached to the lower end of the main body 1 by caulking the lower end of the main body 1.
[0012]
On the other hand, in the anti-vibration mount of the embodiment of the present invention, the upper part of the cylindrical main body fitting 1 is bent at an acute angle inward as shown in FIG. A step portion 11 extending inward from the main body fitting 1 with a lower surface is formed over the entire circumference by the vibration-proof base 2.
[0013]
On the other hand, in the partition plate 5, the outer peripheral portion 14 is formed on the inner peripheral portion 13 of the lower surface 12 of the step portion 11, and the flow path 15 from the upper liquid chamber 6 to the orifice 8 is partially formed. A plate portion 16, a tubular portion 17 extending downward from an outer peripheral portion 14 of the top plate portion 16, a flange portion 18 extending from a lower portion of the tubular portion 17 to an inner surface of the main body fitting 1, A cylindrical crimping portion 19 extending downward from the outer peripheral portion of the collar portion 18 and being caulked by the main body fitting 1 together with the mounting fitting 9 and the like, and a lower liquid chamber 7 formed in the cylindrical portion 17. And the flow path 20 to the orifice 8.
[0014]
The flow path 15 is formed by recessing the partition plate top plate portion 17 in a groove shape as shown in the drawing. In the embodiment of the present invention, the orifice 8 is formed by such a configuration so that the step portion 11 and the partition plate 5 are separated from each other. And the main body 1.
[0015]
Thus, in the liquid-filled anti-vibration mount of the embodiment of the present invention, since the stepped lower surface 12 of the anti-vibration base 2 forms a part of the orifice 8, the shape of the partition plate 5 is a simple one having a substantially convex cross section. Thus, the press forming of the partition plate 5 can be performed easily and at low cost.
[0016]
Further, since the press forming of the partition plate 5 is facilitated, the shape of the partition plate 5 can be easily changed, thereby changing the size of the cross-section of the flow path 15 and the orifice 8 and the like. Tuning can be easily performed.
[0017]
Although the embodiment of the present invention has been described above, the flow path 20 from the lower liquid chamber 7 to the orifice 8 can be formed in the collar 18.
[0018]
【The invention's effect】
As described above, the liquid-filled anti-vibration mount of the present invention has the upper part of the cylindrical main body bent inward, and the bent part as the core, the lower surface inward from the main body. and the stepped portion is circumferentially provided with vibration-isolating base a projecting On the other side, with the body fitting lower end bowl-shaped mounting bracket which is fixed by the bolt is attached by caulking the metal body lower portion, the proof A top plate portion whose outer peripheral portion partially presses against the inner peripheral portion of the lower surface of the step portion formed by the vibration base, and a cylindrical portion extending downward from the outer peripheral portion of the top plate portion; A collar portion extending from the lower portion of the collar portion to the inner surface of the main body fitting, and a cylindrical crimping stopper portion extending downward from the outer peripheral portion of the collar portion together with the mounting bracket by the body fitting. the specifications include a flow path to the orifice from the lower side liquid chamber which is formed in the cylindrical portion Plate to form a stepped lower surface mount orifice by the vibration isolating base body by recessing the top plate in a groove shape and the partition plate, and is obtained by partitioning formed by the main body metal fitting, stage lower surface of the vibration-isolating base Constitutes a part of the orifice, so that the shape of the partition plate can be made simple with a substantially convex cross-section, thereby easily and inexpensively performing the press forming of the partition plate. Since the press forming of the plate has been facilitated, the shape of the partition plate can be easily changed, and this has a remarkable effect that tuning of the function of the anti-vibration mount can be easily performed, such as changing the orifice formation by the stiffness. .

[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a liquid-filled anti-vibration mount according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a conventional liquid-filled vibration damping mount.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body fitting 2 Vibration-proof base 3 Diaphragm 4 Liquid chamber 5 Partition plate 6 Upper liquid chamber 7 Lower liquid chamber 8 Orifice 9 Mounting bracket 10 Bend part of main body fitting 11 Step part 12 of vibration-proof base 12 Step part lower surface 13 Step part Inner peripheral portion 14 on lower surface Outer peripheral portion 15 and 20 of partition plate top plate Channel 16 Partition plate top plate portion 17 Partition plate cylindrical portion 18 Partition plate brim portion 19 Partition plate caulking stop portion

Claims (1)

A liquid chamber is formed by attaching a vibration-proof base made of a rubber elastic body to an upper opening of a cylindrical body fitting that is erected and a diaphragm made of a rubber film in a lower opening in a liquid-tight manner, respectively. The liquid chamber is divided into an upper liquid chamber and a lower liquid chamber by a partition plate, and these chambers are communicated with each other via an annular orifice. The bent portion is bent at an acute angle, and with the bent portion as a core, a stepped portion having a lower surface inwardly extending from the main body fitting is provided around the vibration-proof base, while a lower end portion of the main body fitting is provided. Is attached by caulking the lower end of the main body fitting with a bowl-shaped mounting fixture fixed with bolts, and the partition plate is attached to the inner peripheral portion of the lower surface of the step by the vibration-proof base, and the outer peripheral portion is pressure from the upper liquid chamber caused to form a flow path to the orifice section A top plate portion, a cylindrical portion extending from the outer periphery of the top plate portion downward, and a flange-like portion extending from the lower portion of the cylindrical portion to the inner surface of the metal body, the flange-shaped portion It is configured to include a cylindrical caulking stopper that extends downward from the outer peripheral portion and is caulked by the main body metal fitting together with the mounting metal part, and a flow path from the lower liquid chamber formed in the cylindrical part to the orifice. the stepped portion lower surface and the partition plate by the vibration isolating base orifice, and the hydraulic antivibration mount, characterized in that the compartments formed by the main body metal fitting by forming recessed top plate portion in a groove shape.

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