JPH0783273A - Vibration control device - Google Patents

Abstract

PURPOSE:To provide a stopper which is light and can be used as a dust cover concurrently. CONSTITUTION:At the upper side of a vibration proof device which is composed of a connecting metal fitting 5 installed to a vibrating body side; a holder 6 installed to a car body side; an insulator 4 placed between the connecting metal fitting 5 and the holder 6, and to cut off the vibration from the vibrating body; and liquid chambers 7 and 8 provided in series to the insulator 4, and an incompressible fluid (liquid) is sealed; a diaphragm form stopper 1 to cover the whole body of the vibration proof device is provided. This stopper 1 is composed of a structure having a cross layer at the center, and rubber layers at both sides, and its center 19 is fixed by the connecting metal fitting 5 and a stopper holding member 2, while its peripheral edges are engaged to the engaging parts 31 formed at the tips of the extensions 32 of the outer tube 3. As a result, a light weight, a waterproof effect, and a dustproof effect can be obtained by this diaphrgm form stopper 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolation device provided to block vibrations from a vibration body such as an engine, and more particularly to a stopper mechanism and a stabilizer mechanism provided in the vibration isolation device. Is.

[0002]

2. Description of the Related Art As shown in FIG. 8, a conventional vibration isolator has a connecting fitting 50 mounted on the side of a vibrating body such as an engine, a holder 60 mounted on a member on the vehicle body side, and the connecting fitting 50 and the holder 60. And a liquid chamber such as a main chamber 70 and a sub chamber 80 in which an incompressible fluid (liquid) is sealed, and the like. In such a configuration, when the vibration amplitude of the insulator 40 becomes abnormally large, the stopper 10 for suppressing the abnormal amplitude is provided outside the outer cylinder 30 supporting the insulator 40, and The stabilizer 20 having a hook shape for restricting the vibration of the stopper 10 is integrally provided with the connecting fitting 50.

[0003]

By the way, the hook-shaped stabilizer 20 having the above-mentioned structure is formed by a press-molded product or the like made of a metal plate material.
In order to secure strength and rigidity, it must be sturdy to some extent, and therefore the weight (mass) must be heavy. In particular, as shown in FIG. 8, since the structure is configured to be provided on only one side, there is a problem that the structure has to be heavy in order to increase the rigidity of the hook portion. is there. Further, the stabilizer 20 is provided in order to exert the stopper function, and is not configured to protect the portion of the insulator 40. Therefore, the insulator 4
0 or the protection of the liquid chambers 70, 80, etc., a dust cover, dust shield, or the like must be separately provided. SUMMARY OF THE INVENTION It is an object (problem) of the present invention to provide a vibration damping device having a stopper mechanism which is lightweight and has an excellent waterproof effect and a dustproof effect, which solves such problems. .

[0004]

In order to solve the above problems, the present invention takes the following measures. That is, a connecting fitting attached to the vibrating body side,
A holder attached to a member on the vehicle body side, an insulator for isolating vibration from the vibrating body between the connecting fitting and the holder, an outer cylinder supporting the insulator, and an abnormal vibration amplitude of the insulator. Regarding a vibration isolator comprising a stabilizer and the like that also serves as a stopper that operates to suppress the amplitude when the size becomes large, the vibration isolator is composed of a sandwich structure of a rubber layer and a cross layer, and the center side is engaged with the coupling fitting. In addition, it is configured to have a diaphragm-shaped stopper whose peripheral edge is engaged with the tip of the extension portion formed on one side of the outer cylinder.

[0005]

By adopting the above construction, the following effects are exhibited in the present invention. That is, as shown in FIG. 1, when the connecting fitting 5 side is attached to the vibrating body (not shown) via the mounting bolts 51, while the holder 6 side is attached to the vehicle body side via the mounting bolts 61, the vibration damping device is provided. In particular, the insulator 4 is in the neutral state. Therefore, as shown in FIG. 1, the diaphragm-shaped stopper 1 is also
It becomes neutral and held so as to form the slack portion 18.

In such a state, when a load is applied between the connecting fitting 5 and the holder 6 and a relative displacement occurs between them, the diaphragm stopper 1 is deformed in various ways. The situation will be described below. First, as shown in FIG. 2, when a downward force (in the arrow direction) is applied from the vibrating body side, the connecting fitting 5 moves downward relative to the outer cylinder 3 connected to the holder 6. Therefore, the stopper 1
Engaging portion 3 provided at the tip of the extension portion 32
With respect to the peripheral edge portion 11 fixed (engaged) to 1, the central portion 19 side fixed (engaged) to the connecting metal fitting 5 side descends downward. Then, the slack portion 18 formed in the neutral state is in a fully extended state, and in this state, the displacement between the outer cylinder 3 side and the coupling fitting 5 side is restricted. That is, the down stopper (bound stopper) function is exerted in this state.

Next, as shown in FIG. 3, when an upward force (arrow direction) is applied from the vibrating body side, the connecting fitting 5 moves relatively upward with respect to the outer cylinder 3 connected to the holder 6. . Therefore, the stopper 1 is fixed to (engaged with) the engaging portion 31 provided at the tip of the extension portion 32, and the central portion is fixed (engaged) to the connecting fitting 5 side with respect to the peripheral edge portion 11. The 19 side rises upward. Then, the slack portion 18 formed in the neutral state is in a fully extended state, and in this state, the outer cylinder 3 side and the connecting fitting 5
The displacement between and is regulated. That is, the rebound stopper function is exhibited in this state.

Next, the case where the relative displacement is made in the left-right direction will be described. For example, as shown in FIG. 4, when the connecting fitting 5 side is pulled rightward (indicated by an arrow) with respect to the outer cylinder 3 connected to the holder 6, the connecting fitting 5 and the connecting fitting 5 are engaged (fixed). The central portion 19 side of the diaphragm-like stopper 1 described above is also pulled and moved rightward in the direction shown by the arrow. As a result, as shown in FIG. 4, a slack portion 18 is formed on the right half side of the stopper 1, and
On the left half side, as the distance between the engaging portion 31 provided at the tip of the extension portion 32 and the connecting fitting 5 increases, this portion of the stopper 1 is pulled and extended. That is, as shown on the left side of FIG. 4, the peripheral portion 11 and the central portion 19 of the stopper 1 are in a linear state, and in this state, the stopper function in the left-right direction is exerted.

Thus, the diaphragm-shaped stopper 1
However, when it is pulled in the vertical direction or the horizontal direction and becomes fully extended at those positions, the stopper function is exerted in each direction such as the bound direction or the rebound direction.

Further, the stopper 1 exhibiting each stopper function as described above has a diaphragm-like shape, and a peripheral edge portion 11 thereof is provided at a tip portion of an extension portion 32 formed on one side of the outer cylinder 3. The stopper 1 serves as a dust cover for the entire vibration isolator because the stopper 1 is engaged with the provided engaging portion 31 and is fixed to the central portion 19 side by the connecting fitting 5 and the stopper holding member 2. Will also fulfill the role of. That is, the diaphragm-shaped main stopper 1 provides the insulator 4 and the vibration-proof device as a whole with a waterproof action and a dust-proof action.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the structure of the present embodiment includes a connecting fitting 5 attached to a vibrating body side such as an engine, a holder 6 connected to a member on the vehicle body side, and between the connecting fitting 5 and the holder 6. From the liquid chambers such as the insulator 4, which shuts off the vibration from the vibrating body, and the main chamber 7, the sub chamber 8 and the like, which are provided in series with the insulator 4 and in which the incompressible fluid (liquid) is sealed. It is based on becoming.

In such a basic structure, a diaphragm-shaped stopper 1 formed so as to cover the insulator 4 is provided above the insulator 4. As shown in FIG. 5, the diaphragm-shaped stopper 1 basically has a cross layer 16 made of a woven fabric or the like at the center and rubber layers 15 and 15 'on both sides thereof. It consists of The diaphragm-shaped stopper 1 having such a sandwich structure is provided between the distal end portion of the extension portion 32 of the outer cylinder 3 and the connecting fitting 5, and is provided so as to cover the insulator 4 and the entire vibration isolator. It is what has been. As shown in FIG. 1, the attachment structure of the diaphragm-shaped stopper 1 has a peripheral edge portion 11 having an engaging portion 3 formed at the tip of the extension portion 32.
1 is adapted to be engaged over the entire circumference by caulking means and the like, and the central part 19 side is provided with a connecting fitting 5
Also, it is adapted to be engaged by the stopper holding member 2. By having such a mounting structure, when the vibrating body (not shown) is fully bound or rebounded, the peripheral portion 1 of the stopper 1 is
Between 1 and the central portion 19, respective stopper functions are exhibited.

In addition to the above, as a mounting portion structure of the stopper 1 having the above-mentioned structure on the side of the central portion 19, a fixing method using bolts 25 and nuts 26 as shown in FIG. A fixing method using a pin or the like may be considered instead of the bolt 25. Further, the concave groove 29 is formed in the stopper holding member 2 or the peripheral portion 11 of the connecting fitting 5 or the like.
It is also conceivable to provide (or fix) the groove 29 and the like by caulking the groove 29.

The operation and the like of this embodiment having the above structure will be described. That is, as shown in FIG. 1, when the connecting fitting 5 is attached to the vibrating body (not shown) via the mounting bolts 51, while the holder 6 is attached to the vehicle body side via the mounting bolts 61, the vibration isolator In particular, the insulator 4 is in the neutral state. In this state, the diaphragm-shaped stopper 1 is also in a neutral state as shown in FIG. 1 and is held so as to form the slack portion 18.

In such a state, when a load is applied between the connecting fitting 5 and the holder 6 and a relative displacement occurs between them, the diaphragm stopper 1 is deformed in various ways. These will be described below. First, as shown in FIG. 2, when a downward force (in the direction of the arrow) is applied from the vibrating body, the connecting fitting 5 moves downward relative to the outer cylinder 3 connected to the holder 6. Therefore, the stopper 1 includes the engaging portion 31 provided at the tip of the extension portion 32.
The peripheral portion 11 fixed (engaged) to the central portion 19 side fixed (engaged) to the connecting fitting 5 side descends downward. Then, the slack portion 18 formed in the neutral state is fully extended, and in such a state, the displacement between the outer cylinder 3 side and the coupling fitting 5 side is restricted. That is, the function as a down stopper (bound stopper) is exhibited.

Next, as shown in FIG. 3, when an upward force (in the direction of the arrow) is applied from the vibrating body, the connecting metal fitting 5 causes the holder 6 to move.
Moves relatively upward with respect to the outer cylinder 3 connected to.
Therefore, the stopper 1 is a center fixed (engaged) to the connecting fitting 5 side with respect to a peripheral edge portion 11 fixed (engaged) to the engaging portion 31 provided at the tip of the extension portion 32. The part 19 side rises upward. Then, the slack portion 18 formed in the neutral state is in a fully extended state, and in this state, the displacement between the outer cylinder 3 side and the coupling fitting 5 side is restricted. That is, the function as a rebound stopper is exhibited.

Next, the case where the relative displacement is made in the left-right direction will be described. For example, as shown in FIG. 4, when the connecting fitting 5 side is pulled rightward (indicated by an arrow) with respect to the outer cylinder 3 connected to the holder 6, the connecting fitting 5 and the connecting fitting 5 are engaged (fixed). The center portion 19 of the diaphragm-shaped stopper 1 described above also moves to the right, which is the direction shown by the arrow. As a result, as shown in FIG. 4, the slack portion 18 is formed on the right half side of the stopper 1, and the engagement portion 31 and the connecting fitting 5 provided at the tip of the extension portion 32 are formed on the left half side. By increasing the distance between
This part of the stopper 1 is pulled and stretched. That is, as shown in the left side of FIG.
A straight line is formed between the center portion 19 and the central portion 19, and the stopper function in the left-right direction is exerted.

Thus, the diaphragm-shaped stopper 1
Is pulled up and down or left and right to be fully extended at those positions, and in this state, the stopper function in each direction such as the bound direction and the rebound direction is exerted.

Further, since the stopper 1 having such a stopper function has a diaphragm shape and is formed so as to cover the entire vibration isolator including the insulator 4, the insulator 4 and Will provide the waterproof function and the dustproof function to the entire anti-vibration device.

[0020]

According to the present invention, there is a coupling fitting attached to the vibrating body side, a holder mounted to a member or the like on the vehicle body side, and between the coupling fitting and the holder to block vibration from the vibrating body. A rubber layer and a cross are related to a vibration isolator including an insulator, an outer cylinder that supports the insulator, and a stabilizer that also serves as a stopper that operates to suppress the vibration when the vibration amplitude of the insulator becomes abnormally large. A diaphragm having a sandwich structure with layers, in which a central portion side is engaged with the connecting fitting and a peripheral edge side is engaged with a tip end portion of an extension portion formed on one side of the outer cylinder. Since a structure with a stopper is adopted, it is lightweight and has a simple structure. Furthermore it has become possible to hear in the lateral direction, provided stopper mechanism. Further, since the stopper mechanism has a symmetrical shape, unlike the conventional one, it does not become a one-way effect state, and it is possible to exert an excellent function as a stabilizer. Further, since the diaphragm-shaped stopper is formed so as to cover the entire vibration isolator including the insulator, the waterproof function and the dustproof function of the entire vibration isolator are enhanced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the overall configuration of the present invention.

FIG. 2 is a partial cross-sectional view showing an operating state of the stopper according to the present invention at full bound.

FIG. 3 is a partial cross-sectional view showing an operating state of the stopper according to the present invention at the time of full rebound.

FIG. 4 is a partial cross-sectional view showing an operating state of the stopper according to the present invention during a full stroke in the left-right direction.

FIG. 5 is a partial cross-sectional view showing a specific structure of the stopper according to the present invention.

FIG. 6 is a partial cross-sectional view showing another embodiment of the stopper mounting portion according to the present invention.

FIG. 7 is a partial cross-sectional view showing another embodiment of the mounting portion of the stopper according to the present invention.

FIG. 8 is a vertical cross-sectional view showing the overall structure of a vibration isolator according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 stopper 11 peripheral part 15 rubber layer 15 'rubber layer 16 cross layer 18 slack part 19 center part 2 stopper holding member 29 concave groove 3 outer cylinder 31 engaging part 32 extension part 4 insulator 5 connecting bracket 51 mounting bolt 6 holder 61 mounting Bolt 7 Main room 8 Sub room

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Suzuki 1 Nagachihata, Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Toyoda Gosei Co., Ltd. Toyoda Gosei Co., Ltd.

Claims (1)

[Claims] 1. A connecting fitting mounted on the vibrating body side, a holder mounted on a member or the like on the vehicle body side, an insulator interposed between the connecting fitting and the holder for blocking vibration from the vibrating body, and the insulator. In an anti-vibration device including a supporting outer cylinder and a stabilizer or the like that also serves as a stopper that operates to suppress the vibration when the vibration amplitude of the insulator becomes abnormally large,
Comprising a sandwich structure of a rubber layer and a cross layer, the center side is engaged with the connecting fitting, and the peripheral side is engaged with the tip of the extension part formed on one side of the outer cylinder. An anti-vibration device having a diaphragm-shaped stopper formed as described above.