【課題】外部磁界ノイズの影響を抑制し、精度よくトルクを測定することが可能なトルクセンサを提供する。【解決手段】周方向に沿って極性の異なる複数の磁極311,312が形成され第1回転部材111と共に回転するリング磁石31と、トーションバーの捩じれに応じて磁極311,312との位置関係が変化し伝達する磁束が変化するように構成された磁気ヨーク41,42と、環状部511,521から径方向外方に突出する対向部513,523を有し磁気ヨーク41,42の磁束を集める集磁リング51,52と、対向部513,523の間に配置された第1磁気検出素子61と、径方向に開口を有する筒状に形成され、第1磁気検出素子61と対向部513,523とを覆うシールド部材63と、を備え、シールド部材63は、第1磁気検出素子61よりも径方向外方に突出しないように設けられている。

    [Problem] To provide a torque sensor whereby the effect of external magnetic field noise can be suppressed, and torque can be measured with good precision. [Solution] The present invention is provided with: a ring magnet 31 in which a plurality of magnetic poles 311, 312 having different polarities are formed along the circumferential direction, the ring magnet 31 rotating together with a first rotary member 111; magnetic yokes 41, 42 configured so that the positional relationship thereof with the magnetic poles 311, 312 changes and the transmitted magnetic flux changes in response to twisting of a torsion bar; magnetism collecting rings 51, 52 for collecting the magnetic flux of the magnetic yokes 41, 42, the magnetism collecting rings 51, 52 having opposing parts 513, 523 protruding outward in the radial direction from annular parts 511, 521; a first magnetism detecting element 61 disposed between the opposing parts 513, 523; and a shield member 63 for covering the first magnetism detecting element 61 and the opposing parts 513, 523, the shield member 63 being formed in a cylindrical shape having an opening in the radial direction; the shield member 63 being provided so as to protrude outward in the radial direction further than the first magnetism detecting element 61.


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    Title :

    トルクセンサ


    Publication date :

    2018-09-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01L Messen von Kraft, mechanischer Spannung, Drehmoment, Arbeit, mechanischer Leistung, mechanischem Wirkungsgrad oder des Drucks von Fluiden , MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE / B62D MOTOR VEHICLES , Motorfahrzeuge



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