Patent ID: 7980766
Filing Date: 2011-07-19
Classification: B60B,F16C

Abstract:
1. A rolling bearing unit comprising: an outer ring; an inner shaft disposed radially inward of said outer ring, said inner shaft including an outer peripheral surface and a first axial end surface, said inner shaft including an inner ring fitting part disposed on said outer peripheral surface adjacent to said first axial end surface; and an inner ring connecting to said inner ring fitting part, said inner ring including first and second axial end surfaces, said first end surface of said inner shaft end being crimped onto said first axial end surface of said inner ring, wherein: said inner ring includes a shoulder, said shoulder including an outer peripheral surface, said outer peripheral surface including an outer diameter; said inner ring includes an annular step portion disposed axially between said shoulder and first axial end surface of said inner ring; said step portion includes a cylindrical surface, said cylindrical surface including an axial outer diameter, said outer diameter of said cylindrical surface being smaller than said outer diameter of the shoulder portion; and said step portion includes an inclined surface, said inclined surface connecting said cylindrical surface to said shoulder, said inclined surface including a diameter, and said diameter of said inclined surface expanding towards said second axial end surface of said inner ring and towards said shoulder,