SENSOR

To provide a sensor capable of more appropriately suppressing swing fluctuations in a magnetic flux density.SOLUTION: A sensor 10 is provided on a shaft 11. In the shaft 11, an input shaft and an output shaft are connected to each other via a torsion bar. The sensor 10 has a permanent magnet 21 conn...

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Bibliographic Details
Main Authors TAMAI TOSHIO, HOTTA KENSAKU, YAMAZAKI KAZUMASA
Format Patent
LanguageEnglish
Japanese
Published 04.02.2021
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Summary:To provide a sensor capable of more appropriately suppressing swing fluctuations in a magnetic flux density.SOLUTION: A sensor 10 is provided on a shaft 11. In the shaft 11, an input shaft and an output shaft are connected to each other via a torsion bar. The sensor 10 has a permanent magnet 21 connected to an end of the input shaft, magnetic yokes 22, 23 connected to an end of the output shaft, auxiliary yokes 24, 25 for collecting magnetic flux of the magnetic yokes 22, 23, and a magnetic sensor 26 for detecting magnetic flux collected by the auxiliary yokes 24, 25. The magnetic yokes 22, 23 have annular portions 31, 33 and a plurality of teeth portions 32, 34 provided at equal intervals along an inner peripheral edge of the annular portions 31, 33. The magnetic yokes 22, 23 are provided so that the teeth portion 32 and the teeth portion 34 are alternately positioned in a circumferential direction. The teeth portions 32, 34 are provided in a rectangular plate shape.SELECTED DRAWING: Figure 2 【課題】磁束密度の振れ回り変動をより適切に抑制することができるセンサを提供する。【解決手段】センサ10は、シャフト11に設けられる。シャフト11は、入力軸と出力軸とがトーションバーを介して互いに連結されてなる。センサ10は、入力軸の端部に連結される永久磁石21、出力軸の端部に連結される磁気ヨーク22,23、磁気ヨーク22,23の磁束を集める補助ヨーク24,25、および補助ヨーク24,25により集磁される磁束を検出する磁気センサ26を有している。磁気ヨーク22,23は、環状部31,33、および環状部31,33の内周縁に沿って等間隔に設けられた複数の歯部32,34を有している。磁気ヨーク22,23は、歯部32と歯部34とが周方向において交互に位置するように設けられる。歯部32,34は、矩形板状に設けられている。【選択図】図2
Bibliography:Application Number: JP20190127795