Driveshaft with two-stage stiffness

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United States of America Patent

PATENT NO 10054167
APP PUB NO 20160238083A1
SERIAL NO

15136003

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Abstract

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A two-stage stiffness driveshaft includes a hollow cylinder having first and second ends and a hollow cylinder stiffness. An inner shaft having first and second ends and an inner shaft stiffness extends through the hollow cylinder. The inner shaft's first end and the hollow cylinder's first end are engaged via a rotational clearance fit. The inner shaft's second end is rotationally fixed to the hollow cylinder's second end to permit the inner shaft's first end to twist through a predetermined angle relative to the inner shaft's second end. The inner shaft's stiffness defines the driveshaft's first-stage stiffness, while the combined stiffness of the inner shaft and the hollow cylinder defines the driveshaft's second-stage stiffness. A damping element positioned between the inner shaft and the hollow cylinder controls variation in torque transmitted by the driveshaft and generates gradual transition between the first-stage stiffness and the second-stage stiffness.

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Patent Owner(s)

Patent OwnerAddress
GM GLOBAL TECHNOLOGY OPERATIONS LLCP O BOX 300 MAIL CODE 482-C23-B21 DETROIT MI 48265-3000

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Defenderfer, Eric J Brighton, US 6 72
Erntser, Stephanie A Novi, US 1 0
Gehringer, Mark Milford, US 3 6
Grimmer, Michael J Troy, US 16 72
Miller, Stephen H South Lyon, US 29 576
Piorkowski, Paul A Milford, US 7 30

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