SHAFT COUPLING STRUCTURE AND ELECTRIC POWER STEERING SYSTEM
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United States of America Patent
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Issued Date -
Feb 9, 2017
app pub date -
Jul 21, 2016
filing date -
Aug 7, 2015
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A shaft coupling structure includes a rotating shaft, a worm shaft, a first member, a second member, and an intermediate member that is an elastic member. The intermediate member is interposed between the first member and the second member. Coupling protrusions of the first member that extend in an axial direction are each inserted between second radial protrusions of the intermediate member and between a plurality of first radial protrusions of the second member. Protruding portions of the first radial protrusions engage with the corresponding recessed portions of the second radial protrusions in the axial direction. When a relative rotation angle between the first member and the second member is smaller than a predetermined angle, ends of each of the second radial protrusions in a circumferential direction each projects in the circumferential direction with respect to a corresponding end of the corresponding first radial protrusion in the circumferential direction.
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