发明授权
- 专利标题: Torque-detecting device
- 专利标题(中): 扭矩检测装置
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申请号: US10556572申请日: 2004-05-10
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公开(公告)号: US07263904B2公开(公告)日: 2007-09-04
- 发明人: Kazuhiko Yoshida , Takashi Koike , Kenichi Iwamoto
- 申请人: Kazuhiko Yoshida , Takashi Koike , Kenichi Iwamoto
- 申请人地址: JP Osaka-shi, Osaka
- 专利权人: NTN Corporation
- 当前专利权人: NTN Corporation
- 当前专利权人地址: JP Osaka-shi, Osaka
- 代理机构: Osha Liang LLP
- 优先权: JP2003-138519 20030516
- 国际申请: PCT/JP2004/006242 WO 20040510
- 国际公布: WO2004/102146 WO 20041125
- 主分类号: G01L3/00
- IPC分类号: G01L3/00
摘要:
To provide a torque detecting device having a sufficient mechanical strength, capable of accomplishing an accurate torque measurement, having a processability excellent for mass-production, and effective to eliminate problems associated with damages which would be brought about during a heat treatment. This torque detecting device includes a target area subject to torque detection (3) provided in a surface region of a torque transmitting shaft (2) made of a steel material; a detecting coil (4) provided in a non-contact fashion in face-to-face relation to an outer periphery of the target area subject to torque detection (3); and a detection signal processing circuit (5). The target area subject to torque detection (3) is a layer of magnetostrictive material comprised of an Al diffusion layer. This diffusion layer contains Al diffused in a steel material in a concentration which gradually decreases from the surface in a direction radially inwardly of the torque transmitting shaft (2).
公开/授权文献
- US20070022809A1 Torque-detecting device 公开/授权日:2007-02-01