Multi-stage torsional damping device
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United States of America Patent
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-
Feb 17, 1987
Issued Date -
N/A
app pub date -
Jun 28, 1985
filing date -
Sep 27, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-stage torsional damping device for a vehicle clutch having a low-rate primary stage to eliminate transmission gear rattle occurring during neutral transmission position and a normal rate resilient and friction damping stage. The first stage consists of a low spring rate, substantially frictionless floating suspension of an inner hub within an outer hub to allow the outer hub to oscillate with engine impulses. A medium rate substantially frictionless second stage may be utilized to cushion the torque transference from the first stage to the normal rate last stage and provides compaction of some of the compression springs for the last stage for a given deflection without friction until the hub parts abut, and the third stage consists of compaction of all of the compression springs and additional deflection with friction. Alternatively, centrifugal weights may be used to lock the inner and outer hubs together at a predetermined rotation level, after which a normal damping operation is effected.
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