| 摘要 |
A ball bearing includes: an inner ring; an outer ring; and a plurality of spherical rolling elements that roll while in contact with the outer ring and the inner ring at contact angles, each contact angle corresponding to the outer ring and the inner ring. The outer ring includes: an inner annular section having a rolling motion surface with which the rolling elements roll while in contact at a certain contact angle; a thin-wall section extending radially outwardly from the inner annular section in an integrated manner; an outer annular section that is provided on an outer edge section of the thin-wall section in an integrated manner so as to support the inner annular section in an axially-movable manner through the thin-wall section; and a fluid-supply hole that supplies pressurized fluid to an annular space partitioned by the inner annular section, the thin-wall section and the outer annular section. The rolling elements being pressed against the outer ring and the inner ring by displacement of the inner annular section in the axial direction, the displacement being caused by elastic deformation of the thin-wall section in the axial direction by the pressurized fluid supplied from the fluid-supply hole. |
