Patent ID: 6989618
Filing Date: 2006-01-24
Classification: F16C,H02K,H02N

Abstract:
1. A rolling bearing with a built-in motor, comprising: a bearing part including a first bearing ring, a second bearing ring, and a plurality of rolling elements; and a motor part including a stator and a rotor for rotationally driving the first bearing ring and the second bearing ring with respect to each other, wherein the first bearing ring includes an inner ring and a cylindrical-shaped inner fixing portion as an extension portion of the inner ring which is monolithically formed with said inner ring so as to be coaxial therewith, and a second bearing ring having an outer ring and a cylindrical-shaped outer fixing portion as an extension portion of the outer ring which is monolithically formed with said outer ring so as to be coaxial therewith, and further wherein said stator and said rotor of said motor part are arranged in a radial direction of said rolling bearing and are located between said inner fixing portion of said first bearing ring and said outer fixing portion of said second bearing ring, wherein the inner ring and outer ring are opposed to each other with the plurality of rolling elements interposed therebetween, wherein at least one of the stator and the rotor is attached to the outer ring only, wherein the inner fixing portion and the inner ring directly are integrated with each other, wherein at least one of the bearing part and the motor part is formed at an axial direction end portion of the bearing with the built-in motor, and wherein the rolling bearing with a built-in motor is configured and arranged as a direct drive motor.