| 摘要 |
PROBLEM TO BE SOLVED: To protect a rolling bearing against electrolytic corrosion by insulating the fixing part of the outer ring constituting the rolling bearing and a rotary shaft holding the outer ring, the fixing part of the inner ring constituting the rolling bearing and the rotary shaft holding the inner ring, and the fixing part of the motor case and the motor base. SOLUTION: The fixing part of the outer ring 11 constituting a rolling bearing 3 and a rotary shaft 4 holding the outer ring 11 and the fixing part of the inner ring 12 constituting the rolling bearing 3 and the rotary shaft 4 holding the inner ring 12 are insulated through an insulation sleeve 24. Consequently, no current flow into the rolling bearing 3 comprising the outer ring 11 and the inner ring 12. Current flow into the rolling bearing 3 is also prevented by insulating the fixing part of the motor case 2 and the motor base through an insulating member. In any case, current does not flow into the rolling bearing 3 interposed between the rotary shaft 4 and the motor case 2 and thereby the rolling bearing 3 is protected against electrolytic corrosion. |
