SPHERICAL BEARING, ROTATION DRIVE DEVICE AND VARIABLE NOZZLE DEVICE

PROBLEM TO BE SOLVED: To provide a spherical bearing having a wide movable range and capable of being applied to various use environments, a rotation drive device, and a variable nozzle device.SOLUTION: A spherical surface upper bearing includes: a shaft body having a portion of which the outer peripheral surface is formed of a spherical surface; a plurality of split bearing bodies individually and independently receiving the spherical surface of the shaft body; energization means energizing the plurality of split bearing bodies arranged along the spherical surface of the shaft body to the shaft body side; and a holding member holding the plurality of split bearing bodies energized to the shaft body side by the energization means. Preferably, the spherical surface upper bearing can be used in a variable nozzle device.SELECTED DRAWING: Figure 1 【課題】広い可動範囲を持ち、様々な使用環境に適用できる球面軸受及び回転駆動装置並びに可変ノズル装置を提供する。【解決手段】外周面が球状面で形成された部分を有する軸体と、前記軸体の球状面を個々独立して受ける複数の分割軸受体と、前記軸体の球状面に沿って配置される前記複数の分割軸受体を前記軸体側に付勢する付勢手段と、前記付勢手段によって前記軸体側に付勢される前記複数の分割軸受体を保持する保持部材と、を有する球面上軸受とする。好ましくは、球面上軸受を可変ノズル装置に用いることができる。【選択図】図１