| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight rolling bearing device which can prevent a part of peripheral surface side with respect to a part of a raceway surface from creeping, and a raceway surface accuracy from deteriorating in an outside raceway member. SOLUTION: In the rolling bearing device, a pulley 2 is fixed to a peripheral surface of an outer ring 10 of a ball bearing 1 by being out-fitted by press fit, the pulley 2 is formed by powder metallurgy processing using aluminum powder and iron powder, an inner circumferential side of the pulley 2 is composed by iron, and a peripheral side of the pulley 2 is composed by aluminum, an intermediate section of the pulley 2 is composed by an alloy of iron and aluminum, and the intermediate section of the pulley 2 is formed so that a composition ratio of aluminum weight with respect to a sum of aluminum weight and iron weight will increase monotonously toward the radial outside. COPYRIGHT: (C)2011,JPO&INPIT |
