| 摘要 |
<p>PROBLEM TO BE SOLVED: To drastically improve the assembly workability while facilitating an alignment work.SOLUTION: A gear case side thrust bearing 52 is rocked around a shaft center C3 of an O-ring 53 via a gear case side radial bearing 51 in a case where axis deviation occurs in an armature shaft 13. A shaft center C4 of the gear case side radial bearing 51 is arranged in the vicinity of the shaft center C3 of the O-ring 53, and axis deviation can be absorbed without increasing a rotation resistance of the armature shaft 13 so much, and alignment can be performed. In addition, because the gear case side radial bearing 51, the gear case side thrust bearing 52, and the O-ring 53 can be attached at the axial direction one side of the armature shaft 13, the gear case side radial bearing 51, the gear case side thrust bearing 52, and the O-ring 53 can be easily assembled to a bearing housing part 34 provided at a deep part of a gear case 31 at once.</p> |
