Rotary shafts – gudgeons – housings – and flexible couplings for ro – Torque transmitted via flexible element – Plural circumferentially spaced elements
Patent
1997-07-18
1999-03-02
Lillis, Eileen Dunn
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Torque transmitted via flexible element
Plural circumferentially spaced elements
464 83, 464 89, F16D 364
Patent
active
058762876
ABSTRACT:
A dual-rate drive coupling (20) for use in transmitting drive torque between drive and driven members. The first torque rate is near zero for no-load and near no-load conditions. A pair of flexible elastomeric arms (24, 26) which is preferably bonded to the inner member (22) are received in recessed portions (44, 46) in the outer member (40) and provide the coupling with this first very low torque rate. When higher torque loading produces a relative rotation between the outer member (40) and the inner member (22) of at least about 15.degree., a pair of snubbing arms (28, 30) of the inner member (22) interact with surfaces of openings (48, 50) of the outer member (50). The contact surfaces of these second snubbing arms (28, 30) are coated with an elastomer to snub all contact between the inner member (22) and the outer member (40) to inhibit vibration induced rattling. In a second preferred embodiment, the elastomeric arms are curved in opposite directions and the metal arms are skewed away from drive engagement such that a relative rotation of at least about 25.degree. is needed to bring the second pair of arms (28, 30) into driving engagement with the outer member (40).
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Lillis Eileen Dunn
Lord Corporation
Thomson Richard K.
Wayland Randall S.
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