Liquid seal anti-vibration device and manufacturing method thereof

Abstract

The disclosed liquid seal anti-vibration device is provided with: an inner tube (1) and outer tube (2); rubber bodies (3, 4) connecting said inner and outer tubes (1, 2) in a liquid-tight manner at two positions separated in the axis direction; a partition wall which, disposed between the two rubber bodies (3, 4), divides into two parts in the axis direction the space between the inner and outer tubes and which comprises an annular rigid member (5a) and an elastic member (5b); liquid chambers (8, 9) formed by sealing a noncompressible fluid in each of the spaces formed by the partition wall (5); and a restricted passage (7) allowing communication between the two liquid chambers (8, 9) formed by the partition wall (5). The aforementioned partition wall (5) is configured from the annular rigid member (5a), which protrudes from the inner tube (1) towards the outer tube side, and from the elastic member (5b), which connects said annular rigid member (5a) to the outer tube (2). The aforementioned restricted passage (7) is configured from one or multiple passage grooves (5c), which, formed on the outer peripheral surface of the annular rigid member (5a), extend at least one time around the circumference thereof, and from a bounding rigid tube member (6) which, attached to the aforementioned elastic member (5b), seals the openings of the passage grooves (5c) via a seal member (5d) in a liquid-tight manner.

Description

technical field [0001] The present invention relates to a so-called differential type liquid-filled anti-vibration device with high vibration damping performance suitable for use as a cab mount and a manufacturing method thereof. The present invention particularly proposes a technique for a liquid-enclosed type anti-vibration device provided with a large cross-sectional area for restricting passages in a rigid annular member that contributes to the formation of a partition wall. The passage groove of the liquid-filled type anti-vibration device can effectively prevent the undesired deformation, damage, etc. of the passage groove, and further effectively prevent the undesired deformation, damage, etc. Achieves excellent vibration damping function over a long period of time as desired. Background technique [0002] Patent Documents 1-5 disclose conventional anti-vibration devices of this type. Patent Document 1 discloses "a liquid-enclosed support, which includes: an inner p...

AI Technical Summary

Problems solved by technology

Therefore, there is a disadvantage that the internal pressure of the one of the liquid chambers cannot be increased sufficiently, so that the flow rate of the working fluid through the restricted flow path is naturally reduced, and therefore, a high damping capability cannot be achieved.

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