| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pump capable of restraining axis inclination and axis offset of a stator, and deformation of an auxiliary magnetic pole section caused by injection pressure at the molding by restraining increase of a gap accompanying addition of the auxiliary magnetic pole section. <P>SOLUTION: In the pump including: a motor 17; an impeller 16 rotated with the motor 17 and flowing a fluid; and a pump case 13 and a separation plate 2 for forming a pump chamber 11 where the impeller 16 is stored, the motor 17 has a stator 5, and a rotor 4 rotatably driven by the stator 5 and rotating the impeller 16. The stator 5 has a magnetic pole section 63 directly opposite to the rotor 4, and has the auxiliary magnetic pole sections 7 projected in the axial direction Ax on both ends of the magnetic pole section 63 in the axial direction Ax. The separation plate 2 has a cylindrical section 21 wherein its peripheral surface is interposed between the stator 5 and the rotor 4, and is provided with a projection section 25 coming in contact with only the magnetic pole section 63 among the magnetic pole section 63 and the auxiliary magnetic pole sections 7 on the cylindrical outer surface 21a of the cylindrical section 21. <P>COPYRIGHT: (C)2013,JPO&INPIT |
