Patent ID: 6616339
Filing Date: 2003-09-09
Classification: F16C

Abstract:
A roller bearing comprising:an outer race including an outer race surface which is formed on an inner peripheral surface thereof and is defined by rotating an outer race surface defining bus about an axis thereof; an inner race including an inner race surface which is formed on an outer peripheral surface thereof and is defined by rotating an inner race surface defining bus about the axis; and a plurality of substantially conical-shaped rolling members respectively interposed between said outer and inner race surfaces, an outer peripheral surface of each of said rolling members being defined by rotating a rolling surface defining bus about its axis; wherein either said outer race surface defining bus and said inner race surface defining bus or said rolling surface defining bus comprises a first radius of curvature, and said rolling surface defining bus, if said outer race surface defining bus and said inner race surface defining bus comprises said first radius of curvature, or, alternatively, said outer race surface defining bus and said inner race surface defining bus, if said rolling surface defining bus comprises said first radius of curvature, comprises: a first bus having a second radius of curvature which is different from the first radius of curvature and substantially disposed at a center in an axial direction of the roller bearing; and second buses disposed on both sides of the first bus, each of the second buses having a third radius of curvature which is different from the first radius of curvature and is also different from said second radius of curvature, wherein at least one of said second buses is directly and continuously connected to said first bus and has a common tangent line in a boundary position therebetween.