| 摘要 |
PURPOSE: To inexpensively and easily improve the performance for removing a stator, reduction of weight, and manufacture of an electric motor by including an edge part coil winding in an insulation housing structure and forming the stator with an easily substitutable structure. CONSTITUTION: An electric motor rotor 4 is mounted in cantilever into an air gap tube 9 of a pump body 1 that includes a front bearing 5 that is common to a pump rotor 2. A stator 20 is inserted into the pump body 1 via a forward insulation capping plate 41, so that it can be mounted and removed. A rear- capping plate 42 becomes the support part of a rear rotor bearing 7 that is in one piece with the air gap tube 9 and is further engaged, via the intermediate product of a ring gasket 49. The forward insulating capping plate 41 is subjected to flange mounting to a pump body 1 by being sealed, and a stator circuit is separated from the outside, thus easily substituting the stator and eliminating the need for replacing an entire electric motor due to damages.
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