BEARING DEVICE

To provide a bearing device outputting, from a strain gauge, a signal capable of detecting preload and eccentricity.SOLUTION: A bearing device includes: a rotating shaft; a first rolling bearing and a second rolling bearing supporting the rotating shaft; a bearing housing for holding the first rolling bearing and the second rolling bearing; a cylindrical first gauge fixing member including a plurality of strain gauges detecting load of the first rolling bearing; and a cylindrical second gauge fixing member including a plurality of strain gauges detecting load of the second rolling bearing. Preload is applied to the first rolling bearing at the first gauge fixing member side, preload is applied to the second rolling bearing at the second gauge fixing member side, the first rolling bearing and the first gauge fixing member are disposed adjacent to each other in an axial direction of the rotating shaft so as to bring respective end faces thereof into contract with each other, and the second rolling bearing and the second gauge fixing member are disposed adjacent to each other in the axial direction of the rotating shaft so as to bring respective end faces thereof into contact with each other.SELECTED DRAWING: Figure 1 【課題】予圧及び偏芯を検知することが可能な信号をひずみゲージから出力する軸受装置を提供する。【解決手段】本軸受装置は、回転軸と、前記回転軸を支持する第１転がり軸受及び第２転がり軸受と、前記第１転がり軸受及び前記第２転がり軸受を保持する軸受ハウジングと、前記第１転がり軸受の荷重を検出する複数のひずみゲージを備えた、円筒状の第１ゲージ固定用部材と、前記第２転がり軸受の荷重を検出する複数のひずみゲージを備えた、円筒状の第２ゲージ固定用部材と、を有し、前記第１転がり軸受には前記第１ゲージ固定用部材側に予圧が加えられ、前記第２転がり軸受には前記第２ゲージ固定用部材側に予圧が加えられ、前記第１転がり軸受と前記第１ゲージ固定用部材とは、端面同士が当接するように前記回転軸の軸線方向に隣接して配置され、前記第２転がり軸受と前記第２ゲージ固定用部材とは、端面同士が当接するように前記回転軸の軸線方向に隣接して配置されている。【選択図】図１