| 摘要 |
PROBLEM TO BE SOLVED: To regulate movement of a rotation axis to an axial direction and to prevent abnormal noise and vibration of an electric motor with reduction gear mechanism, where the rotation axis is arranged, by securely fixing a bearing to the rotation axis. SOLUTION: An armature axis 16 of a motor main body is inserted into an insertion hole 37 formed in a gear case 31. An intermediate part of the armature axis 16 is freely rotatably supported by a ball bearing 41 fixed to the insertion hole 37. A first retaining ring 54 is installed in a first groove part 56 disposed in the armature axis 16. A second retaining ring 55 is arranged in a second groove part 57 formed on a side opposite to the first groove part 56 across the ball bearing 41. The second retaining ring 55 is depressed to the ball bearing 41 by a plastic deformation part 59 obtained by plastic-deforming a part to be worked, which is arranged in the armature axis 16. The ball bearing 41 is inserted between the first and second retaining rings 54 and 55 so as to fix it to the armature axis 16. COPYRIGHT: (C)2009,JPO&INPIT
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