ROTATION DEVICE AND POWER TRANSMISSION DEVICE

The invention discloses a rotating device and a power transmission device. Eccentric rotation of a second rotating body relative to a first rotating body is suppressed. A rotating device (10) is provided with a first rotating body (2) and a second rotating body (3). The first rotating body (2) has a first bearing surface (25) facing in the radial direction. The first rotating body (2) is arranged so as to be rotatable. The second rotating body (3) has a second support surface (33) facing in the radial direction so as to be supported by the first support surface (25). The second rotating body (3) is disposed at a distance from the first rotating body (2) in the axial direction. The second rotating body (3) is disposed so as to be rotatable together with the first rotating body (2) and so as to be rotatable relative to the first rotating body (2). 本发明公开了旋转装置及动力传递装置，抑制第二旋转体相对于第一旋转体的偏心旋转。旋转装置(10)具备第一旋转体(2)和第二旋转体(3)。第一旋转体(2)具有朝向径向的第一支承面(25)。第一旋转体(2)被配置成能够旋转。第二旋转体(3)具有以被第一支承面(25)支承的方式朝向径向的第二支承面(33)。第二旋转体(3)相对于第一旋转体