ELECTRIC POWER STEERING DEVICE AND MANUFACTURING METHOD THEREFOR
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United States of America Patent
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Issued Date -
Nov 8, 2018
app pub date -
Nov 10, 2016
filing date -
Nov 10, 2016
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Abstract
An electric power steering device includes an input shaft, an output shaft, a torsion bar provided at an inner diameter side of the input shaft and the output shaft with coaxially coupling the input shaft and the output shaft each other; and, a torque detection sleeve which is arranged at an outer diameter side of the torque detection encoder part, and of which a rear end portion is externally fitted and fixed to the fitting part. A nitride layer is formed at least at a part, at which the torque detection encoder part is formed, of the outer peripheral surface of the output shaft.
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