Hydraulic mount with triple decouplers

Details Hydraulic mount with triple decouplers Hydraulic mount with triple decouplers

1991-01-09

1992-05-12

Halvosa, George E. A.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

180312, 248562, 248636, 267219, F16F 1300

Patent

active

051120321

ABSTRACT:
A hydraulic mount assembly includes an elastomeric hollow body connected to a pair of opposed mounting members. A resilient diaphragm closes the hollow body and forms therewith a closed cavity that is filled with a damping liquid. A partition plate is provided in the hollow body to divide the cavity into a primary chamber and a secondary chamber. The secondary chamber is enclosed by the diaphragm. An orifice track is provided in the partition plate. The orifice track provides communication between the primary and secondary chambers so as to effect damping. Three decouplers are provided in the partition plate centered relative to distinctive dome areas in the primary chamber; two recessed domes and a center projecting dome. The decouplers respond independently to localized dynamic pressure variations. Together, the orifice track and decouplers serve to restrict and control liquid flow between the chambers so as to passively provide a tunable distinctive dip in dynamic rate to adjust the stiffness at selected high frequencies. A relatively low dynamic rate for small displacements is provided at relatively high frequencies while maintaining damping for large displacements.

REFERENCES:
patent: 4708329 (1987-11-01), Tabata et al.
patent: 4971300 (1990-11-01), Ticks

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