| 摘要 |
PURPOSE:To aim at the lightweightiness of a frame body and improvement in air gap dimensional accuracy by attaching three spots of the frame body solidly formed with two pieces of mounting legs to a stator core with bolts, and installing one spot among them in the part dislocated out of a joining plane. CONSTITUTION:Two pieces of mounting legs 10 and 14 of a frame body 1 whose flat form shows a T-shaped form are solidly formed, and the frame body 2 is clamped to a stator core 19 by three bolts 20 being screwed in bolt holes 15, 16 and 18 of these mounting legs 10 and 14 while making joining planes 9, 11, 12 and 13 of the frame body 2 contact with a top face of the stator core 19. The bolt hole 18 is installed in a recess 17 being off the joining plane 13. Since the frame body 2 consists in two legs, its miniaturization and lightweightiness is possible, and since the joining plane pressed by the stator core 19 is at two spots of 9 and 11, at time of bolt clamping, the recess 17 corrects the imbalance portion of axial tension moment, thereby making the frame body 2 and the stator core 19 both tighly lockable while relaxing the clamping stress being concentrated on a shaft part 8. Consequently, air gap dimensional accuracy of a motor is improved without requiring high accuracy on the joining plane in particular.
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