Patent ID: 8529134
Filing Date: 2013-09-10
Classification: F16C

Abstract:
1. A rolling bearing apparatus comprising: a rotatable inner ring; a fixed outer ring; rolling elements disposed between raceway grooves of the inner and outer rings; and an inner ring contact member comprising a center axis substantially coinciding with a center axis of the inner ring, the inner ring contact member including an abutment surface that abuts against one axial end surface of the inner ring, where the inner ring contact member includes a conical outer peripheral surface that communicates to the abutment surface and gradually decreases in an outer diameter away from the inner ring, wherein the conical outer peripheral surface is disposed radially inward of a radially-outward edge of the end surface of the inner ring, wherein the outer ring includes an outer portion disposed axially outward of the end surface of the inner ring, wherein the rolling bearing apparatus is disposed so that the inner ring contact member is disposed radially inward with respect to the inner ring, wherein the axial end surface against which the abutment surface abuts protrudes radially outward of an opposite axial end surface of the inner ring, wherein an outermost radius of the abutment surface is less than a radius of the axial end surface against which the abutment surface abuts so as to form a step, wherein the outer portion overlaps, in an axial direction, a portion of the conical outer peripheral surface of the inner ring contact member and the step, wherein, in an entire portion of the outer portion of the outer ring containing a portion which overlaps the abutment surface in the axial direction, an inner peripheral surface of the outer portion of the outer ring has a diameter smaller than that of the raceway groove of the outer ring, and wherein conical outer peripheral surface is configured such that lubricating oil moves along the conical outer peripheral surface under influence of a centrifugal force produced in accordance with rotation of the conical outer peripheral surface.