| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device preventing the detecting accuracy degradation of a bearing preload by making a disturbance magnetic field from a motor hardly reach a magnetostrictive material to prevent the detecting accuracy degradation of a change in the magnetic property of the magnetostrictive material, and to provide a bearing preload detecting device. SOLUTION: Part of a spacer is formed of the magnetostrictive material 10. At least part of the remainder of the spacer formed of the magnetostrictive material 10 is formed of a non-magnetic material, where a magnetic property change detecting means is provided for detecting a change in the magnetic property of the magnetostrictive material 10. COPYRIGHT: (C)2009,JPO&INPIT
|
