PROBLEM TO BE SOLVED: To ensure that the occurrence of an undesired deformation in pawl parts of magnetic yokes is prevented when the magnetic yokes are secured to a yoke holder by caulking, in a torque detection device comprising a multipolar magnet formed in a ring shape and secured to a first shaft, the yoke holder having a cylindrical part secured to a second shaft that is coaxially connected to the first shaft via a torsion bar and surrounding the magnet, a pair of magnetic yokes each having a plurality of pawl parts facing the magnet inside the cylindrical part and secured to the yoke holder, and a sensor unit for detecting a difference in the rotational phases of the first shaft and the second shaft.SOLUTION: Caulking pieces 29c, 30c, each in plural number, that are caulked on the outer circumference of a cylindrical part 27b are provided on a pair of magnetic yokes 29, 30, respectively. The caulking pieces 29c, 30c are disposed on specific pawl parts 29a, 30a selected among a plurality of pawl parts 29a, 30a at positions lapping in the radial direction of the cylindrical part 27b and are formed so as to having a smaller width than that of the pawl parts 29a, 30a.SELECTED DRAWING: Figure 2
【課題】リング状に形成されて第1軸に固定される多極のマグネットと、トーションバーを介して第1軸に同軸に連結される第2軸に固定されるとともにマグネットを囲む円筒部を有するヨークホルダと、円筒部の内側でマグネットに対向する複数の爪部をそれぞれ有してヨークホルダに固定される一対の磁気ヨークと、第1軸および第2軸の回転位相差を検出するセンサ部とを備えるトルク検出装置において、磁気ヨークのヨークホルダへのかしめ固定時に磁気ヨークの爪部に不所望な変形が生じることを防止する。【解決手段】円筒部27bの外周にかしめられる複数ずつのかしめ片29c,30cが、一対の磁気ヨーク29,30にそれぞれ設けられ、かしめ片29c,30cが、複数の爪部29a,30aのうち選択された特定の爪部29a,30aに円筒部27bの半径方向でラップする位置に配置されるとともに爪部29a,30aよりも幅を狭くして形成される。【選択図】 図2
TORQUE DETECTION DEVICE
トルク検出装置
2016-12-08
Patent
Electronic Resource
Japanese