| 摘要 |
An electric motor (5) includes a motor case (30) in which a motor rotating member of which one end is opened and is formed in a cylindrical shape, and a substantially disc-shaped flange member (31) linked so as to close an opening of the one end of the motor case. The flange member is provided with two mounting flanges (31d,31e) to be fixed to the motor mounting part (17) of the speed reduction gear box (4) by outwardly swelling at an irregularly pitched position, and one first abutting flange (31c) abutting to the motor mounting part by outwardly selling between the these two mounting flanges. |
