Electric power steering system
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United States of America Patent
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Apr 10, 2018
Issued Date -
N/A
app pub date -
Dec 18, 2015
filing date -
Jan 7, 2015
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A power transmission coupling that couples an output shaft of an electric motor and a worm shaft together includes a first rotation element coupled to the output shaft, a second rotation element coupled to the worm shaft, and an intermediate element formed of an elastic body and interposed between the first rotation element and the second rotation element. The intermediate element forms a unit integrally including an annular support portion, power transmission portions extending radially from the support portion and interposed between engaging protrusions of the first rotation element and the second rotation element, a spacer arranged inward of the support portion in a radial direction to apply a preload to the worm shaft in an axial direction, and a coupling portion that couples the support portion and the spacer together.
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