01-05-2014 дата публикации
Номер: US20140117799A1
A DC brushless motor having an external rotor, the motor including: a shaft, a stator assembly, an end cover, a housing, and a plurality of permanent magnets. The end cover includes a bearing. The housing includes: an inner wall, and an end. The shaft is connected with the stator assembly. The stator assembly is arranged inside the housing. The permanent magnets are positioned outside the stator assembly on the inner wall of the housing. The end cover is disposed on the end of the housing. The shaft is disposed on the bearing of the end cover. 1. A DC brushless motor , comprising:{'b': '1', 'a) a shaft ();'}{'b': '2', 'b) a stator assembly ();'}{'b': 3', '3', '6, 'c) an end cover (), the end cover () comprising a bearing ();'}{'b': 4', '4, 'd) a housing (), the housing () comprising: an inner wall, and an end; and'}{'b': '5', 'e) a plurality of permanent magnets (); wherein'}{'b': 1', '2, 'the shaft () is connected with the stator assembly ();'}{'b': 2', '4, 'the stator assembly () is arranged inside the housing ();'}{'b': 5', '2', '4, 'the permanent magnets () are positioned outside the stator assembly () on the inner wall of the housing ();'}{'b': 3', '4, 'the end cover () is disposed on the end of the housing (); and'}{'b': 1', '6', '3, 'the shaft () is disposed on the bearing () of the end cover ().'}2. The motor of claim 1 , wherein{'b': 41', '4', '5, 'a plurality of mounting bosses () is disposed on the end of the housing () above end surfaces of the permanent magnets ();'}{'b': 41', '410, 'each mounting boss () comprises a threaded hole ();'}{'b': 3', '31, 'the end cover () comprises a through hole (); and'}{'b': 7', '31', '3', '410', '3', '4, 'a screw () passes through the through hole () of the end cover () and is screwed into the threaded hole () for fixing the end cover () on the housing ().'}3. The motor of claim 2 , wherein{'b': 32', '3', '31, 'a gap () is arranged in an axial direction on a side wall of the end cover () outside the through hole ();'}{' ...
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