JPH056240U - Liquid filled anti-vibration mount - Google Patents

Abstract

(57) [Abstract] [Purpose] A vibration-isolating base made of a rubber elastic body is integrally attached between an upright inner cylinder and an outer cylinder surrounding the inner cylinder to form a mount main body, and the upper part of the mount main body. In a liquid-filled anti-vibration mount in which a vibration damping liquid chamber is provided and a diaphragm made of a rubber film is fixed, the film length of the diaphragm is extended, thereby reducing the tensile strain of the diaphragm to reduce its durability. Along with the improvement, the degree of freedom with respect to the movement of the diaphragm is increased to allow the enclosed liquid to flow well, and the damping capacity of the mount is further improved. [Structure] A fitting outer cylinder (1) in which a diaphragm (6) of the mount is fitted to an outer cylinder (2) of a mount body (4).
1) to the fitting inner cylinder (12) fitted to the inner cylinder (1) of the mount body (4), the fitting inner and outer cylinders (1)
2) and (11) are characterized in that they are fixed in a mountain shape by being raised from the upper part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid-filled type vibration-proof mount, and more particularly to a liquid-filled type vibration-proof mount suitable for being interposed between an automobile suspension and a vehicle body side.

[0002]

[Prior Art]

 A cylindrical vibration-damping mount, in which a vibration-damping base made of a rubber elastic body is integrally interposed between an inner cylinder and an outer cylinder in a concentric arrangement, is interposed between an automobile frame and a suspension member. It is widely used as a shock absorber to reduce the vibration transmitted to the vehicle body.

In recent years, as the quality of automobiles has increased, the chances of using a liquid-sealed vibration-proof mount having a liquid chamber in the vibration-proof substrate have been increasing. As such a liquid-filled antivibration mount, as shown in FIG. 2, a vibration isolation substrate (3) made of a rubber elastic material is fixed between an upright inner cylinder (1) and an outer cylinder (2) surrounding it. A mount main body (4) which is provided with a recess extending in the circumferential direction on the upper surface of the vibration isolating base (3) and a fitting outer cylinder (4) which is press-fitted into the upper part of the outer cylinder (2) of the mount main body (4). A diaphragm part having a diaphragm (6) fixed between the inner cylinder (1) and a fitting inner cylinder (12) which is press-fitted onto the upper part of the inner cylinder (1), and the diaphragm part on the mount body (4). When the recess is made into a liquid chamber (5) by being attached, the liquid chamber (5) is partitioned into a lower liquid chamber (8) and an upper liquid chamber (9) communicating with each other through an orifice (7). The one with stir plate (10) is mainly used.

[0004]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional liquid-filled anti-vibration mount, the diaphragm (6) is fixed by forming a substantially straight line shape in cross section across the fitting outer cylinder (11) and the fitting inner cylinder (12). However, in the above-mentioned configuration, there is a tendency that the membrane length of the diaphragm that repeats expansion and contraction when using the anti-vibration mount is short, and the tensile strain generated during expansion and contraction tends to increase the fatigue level of the diaphragm, and also the movement of the diaphragm is suppressed. However, there is a problem that it affects the fluidity of the enclosed liquid.

The present invention copes with the actual situation as described above, and in particular, by arranging the upper portion of the fitting outer cylinder, the membrane length of the diaphragm is extended without increasing the height of the vibration-proof mount, and thus the diaphragm of the diaphragm is extended. The purpose is to reduce the tensile strain and improve its durability, and also to increase the degree of freedom of the diaphragm to allow the enclosed liquid to flow well and further improve the damping capacity of the mount.

[0006]

[Means for Solving the Problems]

 That is, the feature of the liquid-filled anti-vibration mount of the present invention, which is suitable for the above-mentioned purpose, is that the anti-vibration base body made of a rubber elastic body is integrally attached between the vertically installed inner cylinder and the outer cylinder surrounding the inner cylinder to mount the mount body. In the liquid-filled anti-vibration mount, which was formed and provided with a vibration damping liquid chamber on the upper part of the mount body and a diaphragm made of a rubber film was fixedly mounted, the diaphragm was fitted to the outer cylinder of the mount body. This is because the fitting outer cylinder extends over the fitting inner cylinder fitted into the mount main body cylinder, and is raised and fixed in a mountain shape from the upper part of the fitting inner and outer cylinders.

[0007]

[Action]

 In the liquid-filled anti-vibration mount of the present invention having the above-mentioned configuration, the diaphragm is fixed by raising the required height above the fitting outer cylinder and the fitting inner cylinder, so that a sufficient film length can be obtained for the diaphragm. This secures the tensile strain of the diaphragm to reduce its durability and improve its durability, and also increases the degree of freedom in the movement of the diaphragm to allow the filled liquid to flow well and further improve the damping ability against vibration of the mount. This is possible.

It should be noted that the height of the mount can be made equal to or smaller than that of a conventional one by setting the fitting inner and outer cylinders to a low height in advance.

[0009]

[Embodiment] Hereinafter, a liquid filled vibration proof mount according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a mount according to an embodiment of the present invention, in which a rubber elastic body is provided between an erected inner cylinder (1) and an outer cylinder (2) surrounding the inner cylinder (1) concentrically. A mount body (4) to which a vibration-damping substrate (3) consisting of is integrally attached, and a rubber fixed on the mount body (4) by forming a liquid chamber (5) for vibration damping. And a diaphragm (6) made of a membrane.

The liquid chamber (5) comprises a stirring plate (10) for partitioning the liquid chamber (5) into a lower liquid chamber (8) and an upper liquid chamber (9) via an orifice (7). The sealed liquid flowing through the orifice (7) has a function of damping the vibration transmitted from the inner cylinder (1) to the outer cylinder (2).

On the other hand, the diaphragm (6) is arranged from the upper part of the fitting outer cylinder (11) fitted to the outer cylinder (2) of the mount body (4) to the inner cylinder (1) of the mount body (4). The upper part of the fitting inner cylinder (12) that is fitted over the upper part of the fitting inner cylinder (12) is fixed to the fitting inner and outer cylinders (12) and (11) by being raised in a mountain shape by several centimeters. Due to the structure of the diaphragm (6) which is raised in a mountain shape, the film length (L) of the diaphragm (6) is 110% to 200% of the film length (L ') of the conventional diaphragm shown in FIG. It is possible to form it in the length of.

Since the fitting outer cylinder (11) is preliminarily formed low in consideration of the protrusion of the diaphragm (6), the mount height of the embodiment is equal to or lower than that of the conventional mount. Can be

In the vibration-damping mount of the embodiment of the present invention having the above-mentioned configuration, the diaphragm () is raised by raising the required height over the fitting outer cylinder (11) and the fitting inner cylinder (12). Since 6) is fixed, a sufficient film length (L) is secured in the diaphragm (6), thereby reducing the tensile strain when using the mount of the diaphragm (6) to suppress fatigue. In addition to improving durability, it can exert the action and effect of increasing the degree of freedom in the movement of the diaphragm (6) to allow the mount enclosure liquid to flow well and further improve the damping capacity of the mount against vibration. .

Although one embodiment of the present invention has been described above, it goes without saying that the dimensions, shapes, relative positions, etc. of the components constituting the mount can be appropriately changed without departing from the scope of the present invention. Nor.

[0016]

[Effect of the device]

 As described above, the liquid-filled anti-vibration mount of the present invention is designed such that the diaphragm of the mount is fitted to the outer cylinder of the mount body from the outer cylinder of the mount body to the inner cylinder of the mount body. The upper and lower parts of the fitting inner and outer cylinders were raised and fixed to each other, and the diaphragm was fixed to the upper part of the fitting inner and outer cylinders by the required height so that a sufficient film was formed on the diaphragm. It secures the length, reduces the tensile strain when using the diaphragm mount to suppress fatigue, improves its durability, and increases the degree of freedom in the movement of the diaphragm to allow the mount liquid to flow well, It has the remarkable effect of further improving the damping ability of the mount against vibration.

[Brief description of drawings]

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

FIG. 2 is a sectional view showing a conventional liquid-filled anti-vibration mount.

[Explanation of symbols]

 (1) Inner cylinder (2) Outer cylinder (3) Anti-vibration substrate (4) Mount body (5) Liquid chamber (6) Diaphragm (7) Orifice (8) Lower liquid chamber (9) Upper liquid chamber (10) Agitation Plate (11) Fitting outer cylinder (12) Fitting inner cylinder (L) Membrane length (L ') Membrane length

Claims (1)

[Claims for utility model registration] [Claim 1] A vibration-isolating base made of a rubber elastic body is integrally attached between an erected inner cylinder and an outer cylinder surrounding the inner cylinder to form a mount body. In a liquid-filled anti-vibration mount in which a vibration damping liquid chamber is provided in the upper part of the mount body, and a diaphragm made of a rubber film is fixedly attached, the above diaphragm is attached to the mount body outer cylinder from a fitting outer cylinder. A liquid-filled anti-vibration mount, characterized in that the fitting inner cylinder fitted into the mount body inner cylinder is raised and fixed in a mountain shape from the upper parts of the fitting inner and outer cylinders.