TORQUE DETECTOR AND ELECTRIC POWER STEERING SYSTEM EMPLOYING IT

Title:

TORQUE DETECTOR AND ELECTRIC POWER STEERING SYSTEM EMPLOYING IT

Document Type and Number:

WIPO Patent Application WO/2007/040109

Kind Code:

A1

Abstract:

A torque detector in which carrying performance can be enhanced when a plurality of pieces are carried while the overall profile is low, and an electric power steering system in which energy absorption stroke can be lengthened furthermore. The torque detector comprises a collection ring (5) arranged on the outer circumference of a magnetic circuit forming member provided in a rotator to which torque is applied and collecting magnetic flux, a section (6) for detecting torque applied to the rotator based on the density of magnetic flux collected by the collection ring (5), and a holding ring (7) having a portion fixed to a stationary object on the outer circumference. Opposite end faces in the axial direction of the holding ring (7) are substantially parallel and grooves for receiving a sealing ring are made in the opposite end faces at the fixing portion. Consequently, energy absorption stroke of an electric power steering system where a column capable of absorbing secondary impact energy is fixed to the housing (25) can be lengthened furthermore.

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Inventors:

ISHIHARA TOSHIHARU
TOKUMOTO YOSHITOMO
NAKANE NAOKI

Application Number:

PCT/JP2006/319136

Publication Date:

April 12, 2007

Filing Date:

September 27, 2006

Export Citation:

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Assignee:

JTEKT CORP (JP)
DENSO CORP
ISHIHARA TOSHIHARU
TOKUMOTO YOSHITOMO
NAKANE NAOKI

International Classes:

G01L3/10; B62D5/04

Foreign References:

JP2005265581A	2005-09-29
JP2003072566A	2003-03-12
JP2003329523A	2003-11-19
JP2006071326A	2006-03-16
JP2003149062A	2003-05-21

Other References: