JPH061882U - Liquid-filled anti-vibration mount - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to selectively present the hard and soft spring characteristics required for a running state of a vehicle in a liquid-filled type vibration-damping mount used in a suspension or the like. To do. In a mount having an anti-vibration substrate 3 provided between an inner cylinder 1 and an outer cylinder 2, a disk-shaped plate 4 and an abutting surface portion 7 are made to face each other at the end of the inner cylinder 1 and the end of the outer cylinder 2. With the provision
The pressurizing chamber 1 is connected to the disk-shaped plate 4 by a first liquid chamber 10 formed by an elastic wall so as to project to the other side, and a diaphragm 12 provided in a part of the first liquid chamber 10 communicating with the first liquid chamber 10.
2 is provided with the second liquid chamber 14, and the second liquid chamber 1
The fourth pressure chamber 13 is connected to a predetermined pressure source so that the pressure can be varied.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a liquid-filled type vibration-damping mount that is mounted so as to be interposed between a vehicle body and a suspension of an automobile.

[0002]

[Prior art]

 A cylindrical anti-vibration mount, in which a rubber elastic body is integrally interposed between a concentric inner cylinder and an outer cylinder, is a cylindrical anti-vibration mount that is placed between the vehicle body and the suspension of the vehicle. It is widely used as a shock absorber to reduce the transmitted vibration.

As this type of mount, a conventional type, which has a vibration-isolating base made of rubber solid, and a liquid-filling type, which has a liquid chamber on the anti-vibration base, are selectively used. As the latter liquid-filled type vibration-proof mount, for example, the one disclosed in Japanese Examined Patent Publication No. 3-30737 is known.

That is, in the above-mentioned vibration-proof mount, a vibration-proof base made of a rubber elastic body is fixed between the inner cylinder and the outer cylinder, and at the axial end portion of the inner cylinder, a disk-shaped plate that expands radially outward is provided. On the other hand, the axial direction end of the outer cylinder is provided with abutting surface portions that face the disc-shaped plate at a predetermined interval, respectively, and the first liquid that communicates with the orifice on the contact surface side of the disc-shaped plate. The chamber and the second liquid chamber are formed by rubber elastic walls.

The vibration-damping mount is configured so that when a relatively large vibration is applied to the body component parts attached to the outer cylinder and the inner cylinder, respectively, the rubber of one of the liquid chambers is When the elastic wall abuts on the abutting surface portion, the liquid flow action between the liquid chambers has an effect of damping the vibration.

[0006]

[Problems to be solved by the device]

 By the way, there are various modes of vibration transmitted from the road surface depending on the running state of the automobile, and even under constant vibration conditions, for example, when the mount is required to have a soft spring characteristic, such as when traveling at high speed, and when it is turning, for example. In some cases, a hard spring characteristic is required, and in the above conventional vibration-proof mount, it is not possible in terms of its structure to satisfy these different spring characteristic requirements in a compatible manner.

The present invention has been made in consideration of the above-mentioned actual situation, and by finding a new structure in the liquid-filled portion of the vibration-proof mount, the vibration-proof mount can be adapted to the vibration-proof mount depending on the running condition of the vehicle. The purpose is to selectively present different spring characteristics required.

[0008]

[Means for Solving the Problems]

 That is, the feature of the liquid-filled type vibration damping mount of the present invention which meets the above-mentioned purpose is that the inner cylinder end portion is the vibration damping mount in which the vibration damping base body made of a rubber elastic body is provided between the inner cylinder and the outer cylinder. Is provided with a disk-shaped plate that expands outward in the radial direction, and a contact surface portion that faces the disk-shaped plate at a predetermined interval is formed on the outer tube or a counterpart member to which the outer tube is attached. Then, the disc-shaped plate communicates with the first liquid chamber formed by the elastic wall that projects toward the other side and abuts against the other plate, and the first liquid chamber is communicated, and the pressure is applied through a diaphragm provided in a part of the first liquid chamber. A second liquid chamber to which a chamber is attached, and the pressure chamber of the second liquid chamber is connected to a predetermined pressure source so that the pressure can be varied. Further, in the above-mentioned vibration-proof mount, it is possible to form a plurality of first liquid chambers and second liquid chambers, or one of these liquid chambers.

[0009]

[Action]

 The anti-vibration mount of the present invention controls the flow of the enclosed liquid between the liquid chambers by utilizing the pressure from the outside, and when a relatively soft spring characteristic is required at high speed running etc. By keeping the pressurizing chamber at about atmospheric pressure, the diaphragm is freely deformed to allow the enclosed liquid to flow against vibrations, and the vibrations are absorbed by the vibration-proof base and the elastic body on the wall of the liquid chamber. On the other hand, when a relatively hard spring characteristic is required at the time of turning, the pressure source is actuated to pressurize the pressurizing chamber and suppress the deformation of the diaphragm of the second liquid chamber. By solidifying the first liquid chamber, it becomes possible to give the mount a higher spring constant than the above.

[0010]

【Example】

 Hereinafter, embodiments of the liquid-filled type vibration-proof mount of the present invention will be described with reference to the accompanying drawings. 1 is a vertical cross-sectional view of an antivibration mount according to a first embodiment of the present invention, and FIG. 2 is a bottom view of a disc plate of the same embodiment. In FIG. 1, (1) is an inner cylinder and (2) is The outer cylinder (3) indicates a vibration-damping base made of a rubber elastic body fixed between the inner and outer cylinders (1) and (2), respectively.

This vibration-proof mount is larger than the outer cylinder (2) in the radial outward direction at the upper axial end portion of the inner cylinder (1) extending in the required length in the axial direction from the outer cylinder (2). A disk-shaped plate (4) having a diameter is provided. The disc-shaped plate (4) is fixed to the body-side component (6) together with the inner cylinder (1) by a bolt (5) which is inserted through the inner cylinder (1).

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

On the other hand, the lower surface of the disk-shaped plate (4) is provided with a first liquid chamber (10) formed by a rubber elastic wall (9) protruding toward the contact surface portion (7) and contacting the contact surface portion (7). Since the first liquid chamber (10) is disposed in contact with the contact surface member (7) as shown in FIG. 1, it has a required thickness and elasticity. In addition, inside the disk-shaped plate (4), the first liquid chamber (10) communicates with the communication passageway (11), and a diaphragm (12) made of a rubber film provided on the upper part of the disc-shaped plate (4). A second liquid chamber (14) provided with a pressurizing chamber (13) is provided. The pressure chamber (13) of the second liquid chamber (14) is connected to a pressure source (15) composed of a hydraulic pump, a pneumatic pump, etc., as shown in FIG. ) Is provided so that the applied pressure can be freely controlled by a control signal (16) from the controller.

Next, a method of using the mount of the present invention having the above-mentioned configuration will be described. As described above, automobiles are not uniform in the form of vibrations transmitted from the road surface depending on the running condition, and the vibration-proof mount is required to have soft spring characteristics and hard spring characteristics depending on the situation. However, the anti-vibration mount of the present invention uses the pressure from the outside to control the flow of the enclosed liquid between the liquid chambers (10) and (14), thereby making It is possible to selectively present the spring characteristic of the. That is, when a relatively soft spring characteristic is required at the time of high speed traveling, the diaphragm (12) is freely deformed by keeping the pressurizing chamber (13) at about atmospheric pressure, and the enclosed liquid against vibrations. While the vibration is absorbed by the vibration isolating base (3) and the elastic body of the liquid chamber wall (9), if a relatively hard spring characteristic is required during turning, the pressure source (15 ) Is applied to pressurize the pressurizing chamber (13) to suppress the deformation of the diaphragm (12) of the second liquid chamber (14), thereby solidifying the first liquid chamber (10). It is possible to give the mount a higher spring constant than the above.

Further, by controlling the magnitude of the pressure of the pressure source (15), it is possible to obtain the intermediate characteristics of the above-mentioned hard and soft spring characteristics. Further, since a large liquid flow occurs when no pressure is applied, it is possible to obtain damping performance in a predetermined frequency range by appropriately setting the length and cross-sectional dimension of the communication passageway (11).

The embodiment of the present invention has been described above. The pressure medium of the pressure source (15) may be either liquid pressure or gas pressure, but when it is desired to have a large difference in hardness and softness in spring characteristics. Is preferably hydraulic. Further, in order to stably obtain the above-mentioned spring characteristics, it is possible to provide a plurality of pairs of the first liquid chamber (10) and the second liquid chamber (14) or a plurality of any one of the liquid chambers. Is.

[0017]

[Effect of device]

 As described above, the liquid-filled type vibration isolation mount of the present invention is a mount in which the vibration isolation substrate is provided between the inner cylinder and the outer cylinder, and the inner cylinder end and the outer cylinder end are opposed to each other in a disk shape. A plate and a contact surface portion are provided, and a first liquid chamber formed by an elastic wall projecting toward the other side and abutting against the disk-shaped plate is communicated with the first liquid chamber, and a part thereof is provided. A second liquid chamber to which a pressure chamber is attached via a diaphragm provided in, and the pressure chamber of the second liquid chamber is connected to a predetermined pressure source so that the pressure can be varied. When relatively soft spring characteristics are required at high speeds, the pressure chamber is maintained at about atmospheric pressure to allow the diaphragm to freely deform and allow the enclosed liquid to flow against vibrations. The elastic body on the wall of the liquid chamber absorbs the above vibration, while turning When a relatively hard spring characteristic is required, the pressure chamber is pressurized by operating the pressure source to suppress the deformation of the diaphragm of the second liquid chamber, thereby solidifying the first liquid chamber. It is possible to give a higher spring constant to the mount than the above, and it is possible to appropriately and selectively present the hard and soft spring characteristics required by the running state of the car while having a simple structure. It has a remarkable effect.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a liquid-filled type vibration damping mount according to an embodiment of the present invention.

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

[Explanation of symbols]

 (1) Inner cylinder (2) Outer cylinder (3) Anti-vibration base (4) Disc plate (5) Bolt (6) Body side component (7) Abutment surface (8) Tire side component (9) Elastic Wall (10) First liquid chamber (11) Communication passage (12) Diaphragm (13) Pressurizing chamber (14) Second liquid chamber (15) Pressure source (16) Control signal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tadayoshi Ohira Inventor, Tadayoshi Ohira, Miyoshi-cho, Nishikamo-gun, Aichi Prefecture, Uchikoshi, No. 3, Igayama, Toyo Tire & Rubber Co., Ltd. (72) Inventor Hiroyuki Takabayashi Nishikamo-gun, Aichi Prefecture 3 Yoshigayama, Uchikoshi, Miyoshi Town Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center

Claims (2)

[Scope of utility model registration request] 1. An anti-vibration mount having an anti-vibration base body made of a rubber elastic body provided between an inner cylinder and an outer cylinder surrounding the inner cylinder, wherein a disk-shaped plate extending outward in a radial direction is provided at an end of the inner cylinder. At the same time, the outer cylinder or a counterpart member to which the outer cylinder is attached is formed with an abutting surface portion that faces the disc plate at a predetermined interval, and the disc plate protrudes toward the other side to form a contact surface portion. A first liquid chamber formed by an abutting elastic wall, and a second liquid chamber communicating with the first liquid chamber and provided with a pressurizing chamber via a diaphragm provided in a part thereof, and A liquid-filled anti-vibration mount characterized in that the pressure chamber of the two-liquid chamber is connected to a predetermined pressure source to make the pressure variable. 2. The liquid-filled vibration damping mount according to claim 1, wherein a plurality of the first liquid chamber and the second liquid chamber or one of these chambers are formed.