Patent ID: 7106481

Claim:
A bearing device, having a convex cylindrical shape, comprises: a stator yoke having a cylindrical central hole concentrically and axially with a rotating shaft and forming a circumferential bearing building screw on top and a thrust groove on the bottom, a radial bearing, having a cylindrical central hole concentrically and axially with the rotating shaft and forming a circumferential bearing screw on a peripheral surface thereof on top and a building groove on a top surface thereof, and a thrust bearing fixed on the thrust groove, wherein the radial bearing is inserted into the cylindrical central hole in the stator yoke, the radial bearing is attached to a cylindrical bearing building screw, and the building groove on the top surface of the radial bearing is a tool groove when the radial bearing is attached to the circumferential screw, and, when the screws formed on the radial bearing are attached to the screw formed on the stator yoke, the radial bearing is detachable from the stator yoke.