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Magnetostriction type torque detection sensor

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  • Publication Date:
    June 30, 2020
  • Additional Information
    • Patent Number:
      10697,842
    • Appl. No:
      16/113511
    • Application Filed:
      August 27, 2018
    • Abstract:
      There is provided a magnetostriction type torque detection sensor which is improved in torque detection sensitivity by increasing respective magnetic paths which are formed between a detected object and a plurality of cores attached to an insulating tubular body in such a manner that a magnetic path which is formed at the detected object is at a predetermined angle to an axis of the detected object. A plurality of cores is arrayed while being inclined at a predetermined angle to an axis of a detected object, and end surfaces of two-side leg portions are attached in such a way as to face the detected object via an inner circumferential surface of an insulating tubular body.
    • Inventors:
      SHINANO KENSHI KABUSHIKI KAISHA (Nagano, JP)
    • Assignees:
      SHINANO KENSHI KABUSHIKI KAISHA (Nagano, JP)
    • Claim:
      1. A magnetostriction type torque detection sensor comprising: an insulating tubular body concentrically attached in such a way as to cover an outer circumference of a detected object; a plurality of detection coils wound along a groove provided on a circumferential surface of the insulating tubular body; and a plurality of cores attached to the insulating tubular body in such a manner that each of the plurality of detection coils passes through a U-shaped space portion surrounded by a bridging portion connecting two-side leg portions, wherein the plurality of cores is arrayed while being inclined at a predetermined angle to an axis of the detected object and is attached in such a manner that end surfaces of the two-side leg portions face the detected object via an inner circumferential surface of the insulating tubular body.
    • Claim:
      2. The magnetostriction type torque detection sensor according to claim 1 , wherein the plurality of cores is attached to the insulating tubular body in such a manner that a magnetic path which is formed at the plurality of cores and the detected object is at an inclination angle of any one of ±45° to the axis of the detected object.
    • Claim:
      3. The magnetostriction type torque detection sensor according to claim 2 , wherein a first insulating tubular body to which the plurality of cores is attached in such a manner that a magnetic path which is formed at the detected object is formed at an inclination angle of +45° to the axis of the detected object and a second insulating tubular body to which the plurality of cores is attached in such a manner that a magnetic path which is formed at the detected object is formed at an inclination angle of −45° to the axis of the detected object are located close to each other in an axial direction.
    • Patent References Cited:
      5280729 January 1994 Aoki
      5589645 December 1996 Kobayashi
      5816599 October 1998 Soejima
      5850045 December 1998 Harada
      6412356 July 2002 Kouketsu
      9983075 May 2018 Nakamura
      2005/0160835 July 2005 Masaki
      2005/0204830 September 2005 Kuroda
      2016/0305833 October 2016 Nakamura
      2018/0067007 March 2018 Shimizu
      2005-321272 November 2005
      5683001 March 2015
    • Other References:
      European Search Report dated Mar. 14, 2019 in European Application No. 18191760.0. cited by applicant
    • Primary Examiner:
      Noori, Max H
    • Attorney, Agent or Firm:
      Weyer, Esq., Stephen J.
      Stites & Harbinson, PLLC
    • Accession Number:
      edspgr.10697842