| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure by which a rotational resistance (moving torque) during operation can be suppressed low by preventing surplus lubricating oil from being fed to a part where balls 7a in a large diameter row side with a large pitch circle diameter are arranged. <P>SOLUTION: A slope part 18 is formed in an inner periphery of rim 16 of a holder 14 of the large diameter row side. an outwardly directed flange 13a formed in the outer periphery of the rim 17 of a holder 15 of a small diameter row sides the slope part 18. The surplus lubricating oil of the lubricating oil coming into an inner space 11 from a small diameter side opening is guided by the slope part 18 and is discharged outside of the inner space 11 to prevent the surplus lubricating oil from being fed to the part where the balls 7a of the large diameter row side are arranged. <P>COPYRIGHT: (C)2012,JPO&INPIT |
