Fluid-filled mounting device

A fluid-filled mounting device comprising:

• a first and second support member which are disposed so as to be spaced apart from each other by a predetermined distance in a load-receiving direction in which a vibrational load is applied, said first and second support members being attached to respective members which are connected by the mounting device in a vibration damping or isolating manner;
• an elastic rubber body interposed between said first and second support members, for elastically connecting the first and second support members to each other;
• a pressure-receiving chamber and a variable-volume equilibrium chamber provided between said first and second support members, such that a partition wall extending in a direction substantially perpendicular to said load-receiving direction is disposed between said pressure-receiving and equilibrium chambers, said pressure-receiving chamber being disposed on the side of said first support member for receiving vibrations to be damped or isolated, while said equilibrium chamber being disposed on the side of said second support member, at least a part of said equilibrium chamber being constituted by a flexible diaphragm;
• a predetermined non-compressible fluid filling said pressure-receiving chamber and said equilibrium chamber;
• an orifice passage for connecting said pressure-receiving chamber and said equilibrium chamber with each other, so as to permit the fluid to flow between the pressure-receiving and equilibrium chambers;
• a block-shaped movable member which is freely movable accommodated within said pressure-receiving chamber and divides the pressure-receiving chamber into two sections, said block-shaped movable member having a pair of end surfaces opposite to each other in said load-receiving direction, one end surface disposed toward the partition wall and the other end surface disposed away from the partition wall, and a side surface connecting between said end surfaces, said side surface cooperating with an inner wall of the pressure-receiving chamber to define a resonance portion having a predetermined space through which the non-compressible fluid flows between said two sections of the pressure-receiving chamber upon application of the vibrational load to the mounting device, said movable member being biased to move in a direction away from the partition wall when the mounting device is in an operative position;
• and
• support means provided between said movable member and the inner wall of said pressure-receiving chamber, for preventing the end surface of the movable member disposed away from the partition wall from contacting the inner wall of the pressure-receiving chamber in said load-receiving direction, said support means including opposite portions of an inner wall of said elastic rubber body which face each other in at least one direction perpendicular to said load-receiving direction, said opposite portions being tapered such that a distance between the opposite tapered portions gradually decreases in said direction away from the partition wall, said movable member having a configuration whose length is smaller than a maximum value of said distance between said opposite tapered portions and larger than a minimum value of said distance, the movable member biased in said direction away from the partition wall being supported by said opposite tapered portions in abutting contact therewith.