| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low cost and lightweight pre-load adjusting structure for a rolling bearing, which maintains a stable action by suppressing a change in mechanical precision. <P>SOLUTION: A direct drive motor 100 consists of: a cross roller bearing 14; a housing inner 220 supported by an inner ring 14a; a rotor 12 supported by an outer ring 14b made of a material having a thermal expansion coefficient higher than the cross roller bearing 14; and an outer ring retainer 28 for fixing the cross roller bearing 14 with pre-load applied thereto. A bearing support 240 interposed between the housing inner 220 and inner ring 14a is formed of a material having a thermal expansion coefficient higher than the cross roller bearing 14. <P>COPYRIGHT: (C)2008,JPO&INPIT |
