Torque detector and electric power steering device using the same

A torque detector in which a holding ring can be reliably prevented from being fixed to a stationary object in the orientation opposite the correct orientation. The torque detector has a magnetic flux collection ring (5) placed on the outer periphery of a magnetic circuit forming member that is prov...

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Bibliographische Detailangaben
Hauptverfasser: YAHATA NORIYUKI, HAKAMATA SINJI, TOKUMOTO YOSHITOMO, ISHIHARA TOSHIHARU, NAKANE NAOKI, HORIUCHI TOMOHARU, JOUSHITA KANAME
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:A torque detector in which a holding ring can be reliably prevented from being fixed to a stationary object in the orientation opposite the correct orientation. The torque detector has a magnetic flux collection ring (5) placed on the outer periphery of a magnetic circuit forming member that is provided at a rotating body to which torque is applied and collecting magnetic flux generated by the magnetic circuit forming member, a detection section (6) for detecting torque applied to the rotating body based on the density of the magnetic flux collected by the magnetic flux collection ring (5), and the holding ring (7) for holding the magnetic flux collection ring (5) and the detection section (6) and having an installation section (72) which is fixed to a stationary object, at the outside of the radially one side of the ring. A protrusion (73) engaging the stationary object to prevent the holding ring (7) from being fixed to the object is provided on one axial end face of the holding ring (7).