| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor capable of preventing a foreign substance from entering an internal space of a housing while preventing noise from being generated from a bearing and the lifetime of the bearing from being shortened.SOLUTION: A motor 10 comprises: a rotor 12 including a rotary shaft 13; a stator 16; a bearing 20 which supports the rotary shaft 13 in a rotatable manner; a housing 18 which supports the stator 16 and defines together with the stator 16, an internal space S1 in which the rotor 12 is accommodated; a bearing support surface 60 which is disposed so as not to be movable relatively to the housing 18 and supports the bearing 20 while surrounding an outer circumferential surface 58 of the bearing 20; a first groove 62 which is formed in the outer circumferential surface 58 of the bearing 20 or the bearing support surface 60, communicates with the internal space S1 in one end and communicates with an external space S2 of the housing in another end; and a second groove which is formed in the outer circumferential surface 58 of the bearing 20 or the bearing support surface 60 and extends in a circumferential direction so as to cross the first groove 62.SELECTED DRAWING: Figure 2 |
