To provide a torque sensor capable of reducing run-out noise without increasing the number of components.SOLUTION: When the number of total magnetic poles is defined as p (p is an even number), (p/2)-number of N poles 25 and (p/2)-number of S poles 26 are alternately arranged in a circumferential direction in a multipolar magnet 20. Respective yokes of a set of yokes 341, 342 include: ring parts 31, 32 through which the multipolar magnet 20 is inserted; and (p/2)-number of pawls 41, 42 extending in an axial direction from the ring parts 31, 32 to the other one of the yokes. An angle to be calculated by (360[deg]/p) being an average value of center angles formed by boundary lines at both ends of the respective magnetic poles 25, 26 constituting the multipolar magnet 20 in the circumferential direction is defined as an "average magnetic pole angle θp" on a plane vertical to a center axis O of the multipolar magnet 20. Besides, a center angle formed by both ends of the respective pawls 41, 42 in the circumferential direction is defined as a "pawl width center angle θc". The maximum value θc_max of a pawl width center angle of the yoke in an axial direction is set to be larger than the average magnetic pole angle.SELECTED DRAWING: Figure 3

    【課題】部品点数を増加することなく振れ回りノイズを低減可能なトルクセンサを提供する。【解決手段】多極磁石20は、合計磁極数をp(pは偶数)とすると、(p/2)個のN極25と(p/2)個のS極26とが周方向に交互に配置されている。一組のヨーク341、342の各ヨークは、多極磁石20が挿通されるリング部31、32、及び、リング部31、32から他方のヨークに向かって軸方向に延びる(p/2)個の爪部41、42を有する。多極磁石20の中心軸Oに垂直な平面において、多極磁石20を構成する各磁極25、26の周方向両端の境界線がなす中心角の平均値である、(360[deg]/p)で算出される角度を「平均磁極角θp」と定義する。また、各爪部41、42の周方向両端がなす中心角を「爪幅中心角θc」と定義する。軸方向におけるヨークの爪幅中心角の最大値θc_maxは、平均磁極角より大きく設定されている。【選択図】図3


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    Title :

    TORQUE SENSOR


    Additional title:

    トルクセンサ


    Contributors:

    Publication date :

    2020-02-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / 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



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