| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary driving device equipped with a bearing device, capable of suitably pressurizing two ball bearings with a small number of members.SOLUTION: In a rotary driving device 1 for the pressurization of a first ball bearing 81 and a second ball bearing 82 of a bearing device 8, while a spacer member 86 is provided between inner rings 811, 821, a pair of position defining parts (a first position defining part 84 and a second position defining part 89) for defining a separation distance of outer rings 812, 822 by only outer positions among a distance between the outer rings 812, 822 and the outer positions in the direction of a motor axial line L of the outer rings 812, 822 are provided. Accordingly, the spacer member 86 can be disposed only on the side of the inner rings 811, 821 in order to pressurize the first ball bearing 81 and the second ball bearing 82 at fixed positions. |
