| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a double row angular ball bearing capable of attaining low torque when a large axial load is applied. <P>SOLUTION: This double row angular ball bearing has an outer ring having outer ring raceway surfaces of two rows on the inner periphery and forming shoulder parts 15c1 and 15c2 on one side in the axial direction of the respective outer ring raceway surfaces, an inner ring having inner ring raceway surfaces of two rows on the outer periphery so as to be opposed to the outer ring raceway surfaces and forming shoulder parts 16c2 and 16c1 on the other side in the axial direction of the respective inner ring raceway surfaces, and balls 17a and 18a arranged between the raceway surfaces of the mutually opposed inner ring and outer ring. Curvature of the raceway surfaces of the inner ring and the outer ring is set in two-stage curvature on which curvature of raceway surface parts 15a2, 15b2, 16a1 and 16b1 on the shoulder part side with which the balls contact when the axial load is large, is smaller than curvature of raceway surface parts 15a1, 15b1, 16a2 and 16b2 on the bottom part side with which the balls contact when the axial load is small. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
