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1. (WO2017148415) EXTERNAL ROTOR MOTOR

Pub. No.:    WO/2017/148415    International Application No.:    PCT/CN2017/075444
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: H02K 9/08
H02K 9/04
H02K 3/24
Applicants: ROBERT BOSCH GMBH
罗伯特·博世有限公司
ZHU, Tao
朱涛
Inventors: ZHU, Tao
朱涛
Title: EXTERNAL ROTOR MOTOR
Abstract:
An external rotor motor (1) comprises: a shaft (10); a stator (20), surrounding the shaft and fixedly disposed on the shaft (10), wherein, the stator comprises a yoke (21) and a support portion (23) located at a radial inner side of the yoke, a plurality of winding teeth (211) are formed at the yoke, each of the winding teeth has wound thereon a winding (213), and a plurality of openings (233) are formed on the support portion; a rotor (30), surrounding the shaft and disposed at a radial outer side of the stator; a first end cover (40), rotatably supported on the shaft; a second end cover (50) rotatably supported on the shaft, wherein the first end cover, the second end cover and at least a part of the rotor together define an internal space of the outer rotor motor; and airflow driving mechanisms (45, 41, 51), for causing air to pass through gaps around the windings and through the plurality of openings so as to circulate in the internal space. The structure enhances the heat dissipation effect of the outer rotor motor.