JPH0777234A - Liquid sealed type vibro-isolating mount - Google Patents

Abstract

PURPOSE:To improve the extent of durability by installing an inhibitory plate, inhibiting the partial deformation, in the local spot of a vibrationproof base substance to cope with the repetition of severe vibrations attending on large load, and preventing any crack in this part from occurring, in a liquid sealed type vibro-isolating mount. CONSTITUTION:A core fitting 9 is integrally pierced through a vibrationproof base substance 3 at the lower part of a cylindrical lady fitting 1 erected, while a top face 3a of this base substance 3 is formed so as to make it higher in proportion as getting closer to the core fitting 9 nearly, and a flange-form inhibitory plate 16, widening in the radial outward direction with the required width, and partially restricting a movement of the vibrationproof base substance 3, is installed tight in the vicinity of a boundary with the vibrationproof base substance top face 3a of the core fitting 9.

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 mount used to support a vehicle engine in a vibration-proof manner.

[0002]

2. Description of the Related Art A vibration damping function is carried by a liquid enclosed in a volume-variable chamber, while vibration insulation is carried by a vibration-proof base body made of a rubber elastic body forming a chamber wall for enclosing the liquid. A liquid-filled type vibration-proof mount having a large damping coefficient for low-frequency vibration and a high insulating property for high-frequency vibration is conventionally known, and is disclosed in, for example, Japanese Patent Laid-Open No. 61-45130. There is.

In such an antivibration mount, a vibration isolating base made of a rubber elastic body is attached to one opening of a tubular main body fitting, and a diaphragm is attached to the other opening of the tubular main body fitting in a sealed state to form a liquid chamber. At the same time, it has a structure in which the liquid chamber is divided by a partition plate having an orifice. A mounting member for mounting the engine or the vehicle body is integrally fixed to the vibration-proof base and a part of the bowl-shaped portion on the upper portion of the bracket.

[0004]

However, in recent years,
When a vehicle engine, etc. tends to be large, and their weight increases, the load of the antivibration mount that supports the engine also naturally increases, and in particular the antivibration rubber rubber directly receives the vibration of the engine. The burden on the substrate is significant. That is, in the conventional vibration-damping mount, when a large-amplitude vibration with a large load is repeatedly and violently applied to the vibration-damping base for a long period of time, the deformation due to the load concentrates near the center of the vibration-damping base. Therefore, it is considered that a crack such as a tear may occur in this portion, and therefore it is necessary to increase the thickness of the vibration-proof base body or increase the size of the vibration-proof mount.

An object of the present invention is to solve the above-mentioned problems and to eliminate the above-mentioned inconvenience by providing a control plate for suppressing the deformation on a portion of the vibration isolating base which is easily deformed locally. It is what

[0006]

That is, the feature of the liquid filled type vibration damping mount of the present invention which meets the above-mentioned object is that the vibration damping base body made of a rubber elastic body is provided in the lower opening of the cylindrical main body metal fitting and the upper opening. A diaphragm made of a rubber film is attached to each of the parts in a sealed state to form a liquid chamber, and the liquid chamber is divided by a partition plate having an orifice, and a core metal fitting is supported on the vibration-proof substrate as a spindle. In a liquid-filled type vibration-damping mount that is attached to and integrated with the core metal fitting, the core metal fitting is provided so as to penetrate into the liquid chamber, and the upper surface of the vibration damping base body is formed to be higher as it approaches the core metal fitting. In the vicinity of the boundary between the metal fitting and the top surface of the vibration-proof base, a flange-shaped suppressing plate is fixedly provided, which spreads outward in the radial direction with a required width and partially restricts the movement of the vibration-proof base. Further, in the vibration-proof mount, it is also preferable to form the suppressing plate so that the outer peripheral side is inclined so as to improve the stopper function of the suppressing plate. It should be noted that the upper and lower parts mentioned here are merely used for convenience.

[0007]

In the antivibration mount of the present invention, the center of the antivibration base body is easily damaged even if the core fitting of the antivibration base body is greatly moved up and down due to a large load of vibration. Deformation is limited in the vicinity by the suppressing plate, which can prevent local damage in the vicinity of the center of the vibration-isolating base even during long-term use and improve the durability of the mount.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially sectional front view showing a liquid filled type vibration damping mount according to an embodiment of the present invention. A main portion A of the vibration damping mount is a lower opening portion of a cylindrical body fitting 1 as shown in the drawing. Two
A vibration-damping substrate 3 made of a rubber elastic body and a diaphragm 5 made of a rubber film are attached to the upper openings 4 in a sealed state to form a liquid chamber 6, while the liquid chamber 6 is assembled. A partition plate 8 having an orifice 7 is divided into two liquid chambers 6a and 6b which are in communication with each other, and a core metal 9 is integrally attached to the vibration isolating base 3 by vulcanization bonding in the form of a spindle. is doing.

Further, the main portion A of this mount is mounted on the bowl-shaped portion 12 of the upper portion of the bracket, which is fixed to the body side of the vehicle together with the stay 10 of the bowl-shaped portion 12 of the upper portion of the bracket. It is connected only by press fitting the lower part. Then, the core fitting 9 hangs down into the bracket 11, and as shown in FIG.
Engine-side stay 1 having stopper rubbers 13 at the top and bottom
It is being fixed to 4 through the bolt B. Reference numeral 15 shown in the figure is a resin diaphragm cover.

On the other hand, according to the present invention, in the vibration isolating mount as described above, the core metal fitting 9 penetrates into the liquid chamber 6b, and the upper surface 3a of the vibration isolating base 3 becomes higher as it approaches the core metal fitting 9. It is formed like this. At the boundary of the core fitting 9 with the upper surface 3a of the vibration-proof base, a flange-shaped suppressing plate that expands radially outward with a required width and partially restricts the movement of the vibration-proof base is provided on the upper side of the core fitting 9. It is fixed integrally with the metal fitting 9 by caulking.

The restraint plate 16 itself is made of a ring-shaped metal plate, and the main body portion L protruding from the core fitting 9 in the radial direction is formed to have an inclination that the outer peripheral side is lowered.
The width of the body portion L of the suppressing plate 16 is about 5 to 15
It is preferable that the angle is about mm, and that the angle of inclination is about 0 to 45 ° downward from the horizontal.

Therefore, the liquid-filled type vibration-damping mount of the embodiment of the present invention having the above-described structure has the bracket 1 as described above.
1 and the stay 10, the main body metal fitting 1 is on the body side, the engine side stay 14 is the core metal fitting 9 on the engine side,
Use by fixing each. In this case, the engine is supported in a suspended state with respect to the antivibration mount, and the engine is supported by the general antivibration mount due to the mutual fluid flow effect of the liquid chambers 6a and 6b and the antivibration effect of the antivibration base body 3 described above. Similarly, its own vibrations are effectively absorbed.

Further, with respect to a large vibration generated from a road surface when the vehicle is traveling, the stopper rubber 13 of the engine side stay 14 buffers the vertical movement of the core fitting 9 in a buffered manner.

In the vibration proof mount according to the present invention, when the engine side core metal fitting 9 is repeatedly violently moved up and down due to a large load or the like when subjected to the above-mentioned vibration, even if it is violently repeated, it has hitherto been torn. Since the deformation of the vibration isolating substrate 3 near the center of the upper portion of the vibration isolating substrate 3 which is apt to be generated is limited by the suppressing plate 16, it is assumed that the weight of the engine or the like is increased even during long-term use. Also, it is possible to prevent the above-mentioned local damage of the vibration-proof substrate and improve the durability.

[0016]

As described above, in the liquid-filled type vibration-damping mount of the present invention, the core metal fitting is penetrated and integrated with the vibration-damping base body under the standing cylindrical body metal fitting, and the upper surface of this vibration-damping base body is integrated. Is formed so that it becomes higher as it gets closer to the core fitting, and extends in the radial outer direction with a required width in the vicinity of the boundary between the core fitting and the top surface of the vibration isolating base to partially limit the movement of the vibration isolating base. The control plate is fixed to support the engine in a vibration-proof manner by the reversible flow of the enclosed liquid, etc., while the engine moves up and down due to external vibration.
Even if the core fitting that supports this is repeatedly and violently moved, the deformation is limited by the suppression plate in the vicinity of the upper center of the vibration-isolating base, which has conventionally been liable to cause the occurrence of tears, etc. Even in use, and at the same time, even if the weight of the engine or the like increases, it is possible to surely prevent the local damage to the vibration isolation substrate and improve the durability of the vibration isolation mount. Is.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing a liquid filled type vibration damping mount according to an embodiment of the present invention.

[Explanation of symbols]

 1 Body Metal Fitting 2 Lower Opening 3 Vibration Isolation Base 4 Upper Opening 5 Diaphragm 6, 6a, 6b Liquid Chamber 7 Orifice 8 Partition Plate 9 Core Fitting 10 Stay 11 Bracket 12 Bowl-like Part 13 Stopper Rubber 14 Engine Side Stay 15 Diaphragm Cover 16 Suppression plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatsugu Takaoka 3rd Ikagayama, Uchikoshi, Miyoshi-cho, Nishikamo-gun, Aichi Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center

Claims (2)

[Claims] 1. A liquid chamber is formed by sealingly attaching a vibration-damping base made of a rubber elastic body to a lower opening of a tubular main body fitting and a diaphragm made of a rubber film to an upper opening thereof to form a liquid chamber. In a liquid-filled type vibration-proof mount in which the liquid chamber is divided by a partition plate having an orifice, and a core metal fitting is attached to the vibration-damping base body in the form of a supporting shaft to integrate the core metal fitting into the liquid chamber. The vibration isolating base is formed so as to be higher in height as it approaches the core fitting, and the vibration isolating base is spread with a required width outward in the radial direction near the boundary of the core fitting with the top surface of the vibration isolating base. A liquid-filled type vibration-proof mount, comprising a flange-shaped suppressing plate that partially restricts the movement of the base body. 2. The liquid-filled antivibration mount according to claim 1, wherein the suppressing plate is formed so as to have an inclined outer peripheral side.