Patent ID: 7637664
Filing Date: 2009-12-29
Classification: F16C

Abstract:
1. A composite roll bearing, comprising: a first race ring having a circular inner peripheral surface and end-surface portions that are linked to both ends of the circular inner peripheral surface; a second race ring formed with a groove-shaped cross-sectional portion having a first receiving surface that faces one of the end-surface portions at a specified interval, a second receiving surface that faces the other of the end-surface portions at a specified interval, and a third receiving surface that faces the circular inner peripheral surface at a specified interval; a plurality of first rolling objects for thrust bearing that are installed in a first annular race for thrust bearing defined by one of the end-surface portions and the first receiving surface; a plurality of second rolling objects for thrust bearing that are installed in a second annular race for thrust bearing defined by the other of the end-surface portions and the second receiving surface; a plurality of third rolling objects for radial bearing that are installed in a third annular race for radial bearing defined by the circular inner peripheral surface and the third receiving surface; a first retainer that holds the first rolling objects in a rollable state in the first annular race; a second retainer that holds the second rolling objects in a rollable state in the second annular race; and third and fourth retainer portions that extend from the ends of the first retainer and the second retainer, respectively, in the third annular race, and that hold the third rolling objects in a rollable state in the third annular race.