| 摘要 |
PROBLEM TO BE SOLVED: To improve the heat radiation property of a coil, to miniaturize an electric motor, to realize high efficiency, to simplify structure, to improve decomposition property and to provide an environmental electric motor from the point of a recycle. SOLUTION: A stator 1a constituted by inserting a coil 10a into the slot of a stator core 2a, an outer frame 4 divided into plural frames so that they surround the outer periphery of the stator core of the stator, a pair of bearing holding parts 6a and 6b which have engagement parts 35a and 35b engaging the inner diameter reference faces of both end parts of the stator, in which bearings 8a and 8b are installed in a shaft center part and which are installed on both sides of the stator core, so that they cover coil end parts protruded to both sides of the stator, fastening mechanisms 30, 32a, 32b, 6a and 6b fixing the outer frames to the outer periphery of the stator core with a wedge operation between the bearing holding parts and the outer frames by a fastening operation for installing the bearing holding parts to both sides of the stator core and a rotor 3, in which a relief part relieving the outer diameters of parts facing the engagement parts of the respective bearing holding parts and which is installed rotatably with a desired gap in the inner diameter of the stator core are installed.
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