| 摘要 |
PROBLEM TO BE SOLVED: To prevent an unreasonable load in an axial direction from acting in a bearing when a set bolt is tightened even without fixing an outer ring to a yoke, in the case of press fit mounting the outer ring of a bearing in the yoke and an inner ring in an armature shaft, in an electric motor constituted by fixing the yoke with one side opened and a bracket arranged in a yoke opening side by tightening the set bolt. SOLUTION: Any one of an opposed space between a bearing inner ring 9a and an armature shaft stepped surface part 4b regulating movement of this inner ring to a yoke opening side, opposed space between an outer ring 9b and a bearing housing bottom surface part 2c regulating movement of this outer ring to an opposite yoke opening side, and an addition opposed space adding the fellow both the opposed spaces, is placed in a condition before tightening a set bolt, to be set larger than a deformation amount in a yoke axial direction with tightening of the set bolt. |
