发明名称 |
Electric motor having air tightness test holes |
摘要 |
Through a housing of an electric motor, an output shaft attached to a rotor penetrates. In this housing, an air tightness test hole of the electric motor which communicates with internal space of the electric space formed with the housing and a stator is formed. Further, an oil seal which blocks aeration between the internal space and an outside of the electric motor is attached to this housing. |
申请公布号 |
US9590464(B2) |
申请公布日期 |
2017.03.07 |
申请号 |
US201314045936 |
申请日期 |
2013.10.04 |
申请人 |
FANUC CORPORATION |
发明人 |
Yamamoto Tomonaga;Funakubo Makoto |
分类号 |
H02K5/124;H02K5/10;H02K5/22;H02K5/15;F16J15/54;H02K5/04;F16J15/32 |
主分类号 |
H02K5/124 |
代理机构 |
Drinker Biddle & Reath LLP |
代理人 |
Drinker Biddle & Reath LLP |
主权项 |
1. An electric motor comprising: a stator portion which comprises a winding; a housing which is attached to an end of the stator portion; a rotor portion which comprises an output shaft; a bearing which supports the rotor portion; and an oil seal which is attached to the housing such that the output shaft penetrates therethrough, wherein an air tightness test hole of the electric motor which communicates with internal space of the electric motor formed with the stator portion and the housing is provided at a position spaced from a rotation center of the output shaft in a radial direction at a distance larger than half of the outer diameter of the bearing and at a distance smaller than half of the outer diameter of the oil seal, and the oil seal seals the air tightness test hole of the electric motor. |
地址 |
Minamitsuru-gun, Yamanashi JP |