JP2568224Y2 - Liquid-filled anti-vibration mount - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled anti-vibration mount which is mounted between a vehicle body and a suspension.

[0002]

2. Description of the Related Art A cylindrical anti-vibration mount in which an anti-vibration board made of a rubber elastic body is integrally interposed between an inner cylinder and an outer cylinder in a concentric arrangement is provided between a vehicle body and a suspension of an automobile. It is widely used as a shock absorber for reducing vibration transmitted to the vehicle body.

[0003] As this type of mount, there are selectively used a conventional type in which a vibration-proof substrate is made of a rubber solid and a liquid-filled type in which a vibration-proof substrate is provided with a liquid chamber. As the liquid-filled vibration-proof mount, for example, Japanese Patent Publication No. Hei 3-3073
No. 7 is known. That is, the anti-vibration mount fixes the anti-vibration base made of a rubber elastic body between the inner cylinder and the outer cylinder, and disposes a disk-shaped plate expanding radially outward at the axial end of the inner cylinder. At the axial end of the cylinder, there are provided contact surfaces facing the disc-shaped plate at a predetermined interval, respectively, and a first liquid chamber and a second fluid chamber communicating with the corresponding contact surface of the disc-shaped plate through an orifice. It has a configuration in which the liquid chamber and the rubber elastic wall are formed.

The anti-vibration mount is provided in contact with the contact surface when a relatively large vibration is applied to the vehicle body components attached to the outer cylinder and the inner cylinder, respectively. The first liquid chamber expands and contracts in accordance with the vibration of the corresponding contact surface portion, so that a liquid flowing action occurs between the first liquid chamber and the second liquid chamber, thereby having an effect of attenuating the vibration.

[0005]

However, in the above-described conventional vibration damping mount for a suspension, the second liquid chamber having the vibration damping function as described above, but receiving the liquid pressure from the first liquid chamber, has the above-mentioned structure. Since it is provided on the contact surface side of the disc-shaped plate, there is a possibility that the diaphragm swelling due to the hydraulic pressure comes into contact with the corresponding contact surface portion, thereby preventing free deformation of the diaphragm and preventing contact with the contact surface. If gravel or the like splashed by the tire enters between the surface portion and the diaphragm, the diaphragm may be damaged.

The present invention addresses the above situation and finds a new configuration in the liquid chamber, thereby ensuring free deformation of the diaphragm, preventing damage to the diaphragm, and preventing vibration of the anti-vibration mount. It is intended to stabilize the damping characteristics and improve the durability.

[0007]

SUMMARY OF THE INVENTION The anti-vibration mount according to the present invention, which meets the above-mentioned object, is characterized in that an anti-vibration base comprising a rubber elastic body is provided between an inner cylinder and an outer cylinder surrounding the inner cylinder. In the vibration mount, a disk-shaped plate extending radially outward is provided at the end of the inner cylinder, and the outer cylinder or a mating member to which the outer cylinder is attached is opposed to the disk-shaped plate at a predetermined interval. A first liquid chamber formed on the disc-shaped plate by an elastic wall protruding toward and abutting on the contact surface portion, and communicating with the first liquid chamber, and part of the first liquid chamber. And a second liquid chamber provided with a diaphragm made of an elastic film, and the diaphragm of the second liquid chamber is disposed on the side of the disk-shaped plate opposite the contact surface. Further, in the above-described anti-vibration mount,
It is also possible to form a plurality of first and second liquid chambers or one of these liquid chambers.

[0008]

In the anti-vibration mount of the present invention having the above configuration, the diaphragm of the second liquid chamber is replaced with a disk-shaped plate.
By arranging it on the opposite side of the contact surface, even if the diaphragm swells greatly due to large vibration, the diaphragm does not interfere with the contact surface, and the diaphragm can freely deform. At the same time, the damage due to the interference is prevented, and the vibration damping characteristics of the anti-vibration mount can be stabilized and the durability can be improved.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a liquid-filled anti-vibration mount of the present invention. FIG. 1 is a longitudinal sectional view of a vibration isolating mount according to a first embodiment of the present invention, and FIG. 2 is a bottom view of a disk-shaped plate according to the first embodiment.
(1) shows an inner cylinder, (2) shows an outer cylinder, and (3) shows a vibration-proof base made of a rubber elastic body fixed between these inner and outer cylinders (1) and (2).

This anti-vibration mount is provided at the upper axial end of an inner cylinder (1) extending in a required length axial direction from the outer cylinder (2) and radially outwardly larger than the outer cylinder (2). A disk-shaped plate (4) expanding in diameter is provided. The disc-shaped plate (4) is fixed to the vehicle body-side component (6) together with the inner cylinder (1) by bolts (5) that pass through the inner cylinder (1).

On the other hand, at the upper axial end of the outer cylinder (2),
An abutting surface portion (7) facing the disc-shaped plate (4) at a predetermined interval is provided. The contact surface portion (7) is formed to have substantially the same diameter as the disk-shaped plate (4) by a flange formed by extending the outer cylinder (2) in a radially outward direction, and the outer cylinder (2) is attached thereto. It is arranged along the upper surface of the tire-side constituent member (8). In addition, as the contact surface portion, the flange may be omitted, and the contact surface portion may be directly formed on the upper surface of the tire side component (8).

On the other hand, a lower surface of the disc-shaped plate (4) is provided with a first liquid chamber (10) formed by a rubber elastic wall (9) projecting toward and abutting the contact surface (7). The first liquid chamber (10) is provided in contact with the contact surface (7) as shown in FIG. 1, so that the first liquid chamber (10) is provided with a required thickness and elasticity. The first liquid chamber (10) and the communication passage (1) are provided inside the disc-shaped plate (4).
A second liquid chamber (13) provided with a diaphragm (12) made of a rubber elastic film is provided above the diaphragm, and the diaphragm (12) is in contact with the disk-shaped plate (4). It is arranged open to the opposite side to the contact surface (7).

FIGS. 3 and 4 are a bottom view and a sectional view of the disk-shaped plate of the mount of the second embodiment.
Portions other than the plate (14) are the same as those in the previous embodiment, and a description thereof will be omitted. That is, on the lower surface of the disc-shaped plate (14), two first liquid chambers (10), formed by a rubber elastic wall (9) projecting toward and abutting against a contact surface (not shown), (10) are provided to face each other in the radial direction as shown in the figure, while the first liquid chamber (10),
Two second liquid chambers (13) and (13) are provided which communicate with (10) in the communication paths (11) and (11), respectively. As shown in FIG. 4, diaphragms (12) and (12) made of a rubber elastic film are provided above the second liquid chambers (13) and (13), respectively.
4), it is open and disposed on the upper surface, that is, on the side opposite to the contact surface. Thus, in the present invention, it is possible to provide a plurality of first and second liquid chambers, respectively, and it is also possible to provide a plurality of only one of the liquid chambers.

In the anti-vibration mount according to the embodiment of the present invention having the above-described configuration, the vehicle body components (6) and (8) attached to the inner cylinder (1) and the outer cylinder (2), respectively. When the vibration occurs, the first liquid chamber (10) provided in contact with the contact surface (7) expands and contracts with the vibration of the corresponding contact surface (7), so that the second liquid chamber (13). Has a liquid flowing action between them and has the effect of absorbing the vibration. In the anti-vibration mount of the present invention, in particular, the diaphragm (12) of the second liquid chamber (13) is provided on the side of the disk-shaped plates (4), (4) opposite the contact surface (7). Therefore, even if a large vibration is generated and the diaphragm swells greatly due to the liquid flowing action, the diaphragm (12) interferes with the contact surface (7) as in the above-described conventional vibration-proof mount. This ensures that the diaphragm (12) is freely deformed, and is prevented from being damaged by the above-mentioned interference, thereby stabilizing the vibration damping characteristics of the anti-vibration mount and improving the durability. It is.

Although the embodiment of the present invention has been described above, the communication path connecting the first and second liquid chambers can be set in a required frequency range by appropriately setting its length, cross-sectional dimension, and the like. Can be obtained.

[0016]

As described above, the liquid-filled anti-vibration mount of the present invention is provided at the inner cylinder end and the outer cylinder end of the mount provided with the vibration isolation base between the inner cylinder and the outer cylinder. A disk-shaped plate and an abutting surface are provided so as to face each other, and the disk-shaped plate communicates with the first liquid chamber formed by an elastic wall protruding to the other side and abutting against the same, A second liquid chamber provided with a diaphragm made of an elastic film is provided at a part thereof, and the diaphragm of the second liquid chamber is disposed on the side of the disk-shaped plate opposite to the abutting surface. ,
In particular, since the diaphragm of the second liquid chamber can be swelled toward the anti-contact surface side, even if the diaphragm swells greatly due to large vibration, the diaphragm can be in contact with the above-described contact as in the conventional mount described above. There is no interference with the surface portion, whereby the diaphragm is freely deformed, and the damage due to the interference is prevented,
This has a remarkable effect of stabilizing the vibration damping characteristics of the anti-vibration mount and improving the durability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid-filled anti-vibration mount according to an embodiment of the present invention.

FIG. 2 is a bottom view of the disc-shaped plate of the embodiment.

FIG. 3 is a bottom view of the disc-shaped plate according to the second embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

[Explanation of symbols]

 (1) Inner cylinder (2) Outer cylinder (3) Anti-vibration base (4) (14) Disc-shaped plate (5) Bolt (6) Body-side component (7) Contact surface (8) Tire-side component ( 9) Elastic wall (10) First liquid chamber (11) Communication path (12) Diaphragm (13) Second liquid chamber

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroyuki Takabayashi No. 3 Ikayama, Utsugoe, Miyoshi-cho, Nishikamo-gun, Aichi Pref. Toyo Tire & Rubber Co., Ltd. JP, A) JP-A-62-209241 (JP, A) JP-A-63-252246 (JP, A) JP-A-60-136637 (JP, A)

Claims (2)

(57) [Scope of request for utility model registration] 1. An anti-vibration mount in which a vibration-proof base made of a rubber elastic body is provided between an inner cylinder and an outer cylinder surrounding the inner cylinder, a disc-shaped plate extending radially outward is provided at an end of the inner cylinder. Along with the outer cylinder or a mating member to which the outer cylinder is attached, a contact surface portion that faces the disc-shaped plate at a predetermined interval is formed, and the disc-shaped plate protrudes toward the contact surface portion. A first liquid chamber formed by an elastic wall abutting on the first liquid chamber; and a second liquid chamber communicating with the first liquid chamber and partially provided with a diaphragm made of an elastic film. A liquid-filled anti-vibration mount, wherein a diaphragm of a second liquid chamber is disposed on a side opposite to the abutting surface of the disc-shaped plate. 2. The liquid-filled anti-vibration mount according to claim 1, wherein a plurality of the first liquid chamber and the second liquid chamber are provided.