WO2008105541A1 - Torque sensor, electric power steering device, method of producing claw pole, and method of producing torque sensor - Google Patents

Torque sensor, electric power steering device, method of producing claw pole, and method of producing torque sensor Download PDF

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Publication number
WO2008105541A1
WO2008105541A1 PCT/JP2008/053694 JP2008053694W WO2008105541A1 WO 2008105541 A1 WO2008105541 A1 WO 2008105541A1 JP 2008053694 W JP2008053694 W JP 2008053694W WO 2008105541 A1 WO2008105541 A1 WO 2008105541A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
torque sensor
yoke
producing
permanent magnet
Prior art date
Application number
PCT/JP2008/053694
Other languages
French (fr)
Japanese (ja)
Inventor
Atsuyoshi Asaka
Ikunori Sakatani
Takayuki Kobayashi
Shigeya Tanimoto
Toshiyuki Onizuka
Original Assignee
Nsk Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2007051643A external-priority patent/JP2008215942A/en
Priority claimed from JP2007056914A external-priority patent/JP5041139B2/en
Priority claimed from JP2007184711A external-priority patent/JP2009020064A/en
Priority claimed from JP2007208638A external-priority patent/JP2009042122A/en
Priority claimed from JP2007303315A external-priority patent/JP2009128181A/en
Priority claimed from JP2008009274A external-priority patent/JP2009168727A/en
Application filed by Nsk Ltd. filed Critical Nsk Ltd.
Publication of WO2008105541A1 publication Critical patent/WO2008105541A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Power Steering Mechanism (AREA)

Abstract

A torque sensor and an electric power steering device that are reduced in size and have significantly improved material efficiency. The torque sensor has first and second shafts coaxially connected together through a connection shaft, a ring-shaped permanent magnet fixed to the second shaft and circumferentially magnetized with multiple poles, a sensor yoke fixed to the first shaft and forming a magnetic circuit together with the permanent magnet, a magnetism collecting yoke placed on the other side, in the axial direction, of the sensor yoke from the permanent magnet and forming a magnetic circuit together with the permanent magnet and the sensor yoke, and a magnetic flux sensor for sensing magnetic flux induced by the sensor yoke and the magnetism collecting yoke. The torque sensor senses, based on an output of the magnetic flux sensor, torque applied to either of the first and second shafts. The sensor yoke is constructed from claw poles arranged on the same or substantially the same plane, and at least some of the claw poles are formed separated from each other.
PCT/JP2008/053694 2007-03-01 2008-02-29 Torque sensor, electric power steering device, method of producing claw pole, and method of producing torque sensor WO2008105541A1 (en)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP2007051643A JP2008215942A (en) 2007-03-01 2007-03-01 Torque sensor and electric power steering device
JP2007-051643 2007-03-01
JP2007-056914 2007-03-07
JP2007056914A JP5041139B2 (en) 2007-03-07 2007-03-07 Torque sensor and electric power steering device
JP2007-184711 2007-07-13
JP2007184711A JP2009020064A (en) 2007-07-13 2007-07-13 Torque sensor and electric power steering device
JP2007-208638 2007-08-09
JP2007208638A JP2009042122A (en) 2007-08-09 2007-08-09 Torque detector and electric power steering system
JP2007303315A JP2009128181A (en) 2007-11-22 2007-11-22 Torque detector, electric power steering device, and method of producing claw pole
JP2007-303315 2007-11-22
JP2008-009274 2008-01-18
JP2008009274A JP2009168727A (en) 2008-01-18 2008-01-18 Torque detector, its manufacturing method, and electric power steering system

Publications (1)

Publication Number Publication Date
WO2008105541A1 true WO2008105541A1 (en) 2008-09-04

Family

ID=39721363

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/053694 WO2008105541A1 (en) 2007-03-01 2008-02-29 Torque sensor, electric power steering device, method of producing claw pole, and method of producing torque sensor

Country Status (1)

Country Link
WO (1) WO2008105541A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103196607A (en) * 2012-01-10 2013-07-10 罗伯特·博世有限公司 Sensor device
EP2516241A4 (en) * 2010-03-30 2017-09-27 LG Innotek Co., Ltd. Apparatus for detecting torque and steering system having the same
WO2018180533A1 (en) * 2017-03-31 2018-10-04 株式会社デンソー Torque sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004020527A (en) * 2002-06-20 2004-01-22 Nippon Soken Inc Torque sensor
JP2004309463A (en) * 2003-04-04 2004-11-04 Valeo Schalter & Sensoren Gmbh Instrument for measuring torque applied to shaft
JP2006064577A (en) * 2004-08-27 2006-03-09 Jtekt Corp Torque detection apparatus
WO2007003468A1 (en) * 2005-07-04 2007-01-11 Robert Bosch Gmbh Sensor arrangement for detecting a difference angle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004020527A (en) * 2002-06-20 2004-01-22 Nippon Soken Inc Torque sensor
JP2004309463A (en) * 2003-04-04 2004-11-04 Valeo Schalter & Sensoren Gmbh Instrument for measuring torque applied to shaft
JP2006064577A (en) * 2004-08-27 2006-03-09 Jtekt Corp Torque detection apparatus
WO2007003468A1 (en) * 2005-07-04 2007-01-11 Robert Bosch Gmbh Sensor arrangement for detecting a difference angle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2516241A4 (en) * 2010-03-30 2017-09-27 LG Innotek Co., Ltd. Apparatus for detecting torque and steering system having the same
CN103196607A (en) * 2012-01-10 2013-07-10 罗伯特·博世有限公司 Sensor device
WO2018180533A1 (en) * 2017-03-31 2018-10-04 株式会社デンソー Torque sensor
JP2018173294A (en) * 2017-03-31 2018-11-08 株式会社デンソー Torque sensor
CN110402376A (en) * 2017-03-31 2019-11-01 株式会社电装 Torque sensor
CN110402376B (en) * 2017-03-31 2021-02-23 株式会社电装 Torque sensor
US11092502B2 (en) 2017-03-31 2021-08-17 Denso Corporation Torque sensor

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