| 摘要 |
In a rotor portion, a magnet formed in a cylindrical shape, a first magnet holder that holds an impeller-attachment-portion-side end portion of the magnet, a second magnet holder that holds a magnetic-pole-position-detection-element-side end portion of the magnet, a back yoke disposed inside the magnet, a sleeve bearing disposed inside the back yoke, and a position detection magnet that is provided on a surface of the second magnet holder at a side opposite to the side at which the magnet is attached and allows a magnetic flux of the position detection magnet to be detected by the magnetic-pole-position detection element are assembled integrally together with a thermoplastic resin, and the impeller attachment portion is formed of the thermoplastic resin. |
| 主权项 |
1. A pump comprising:
a molded stator including a board on which a magnetic-pole-position detection element is mounted; and a rotor including a rotor portion that is rotatably accommodated in a cup-shaped partition wall component, the rotor portion opposing the magnetic-pole-position detection element at one end and having an impeller attachment portion for attaching an impeller at another end, wherein, the rotor portion includes
a magnet including an impeller-attachment-portion-side end portion and a magnetic-pole-position-detection-element-side end portion,a first magnet holder having a ring shape with an opening and a recess, the impeller-attachment-portion-side end portion of the magnet being held in the recess of the first magnet holder,a second magnet holder having a ring shape with an opening, a first surface and a second surface, the first surface being provided on a first side of the second magnet holder and facing the magnet and having a recess, the second surface being provided on another side of the second magnetic holder opposite the first side and facing away from the magnet, and the magnetic-pole-position-detection-element-side end portion of the magnet being inserted into the recess of the first surface of the second magnet holder,a back yoke disposed inside the magnet,a sleeve bearing disposed inside the back yoke, anda position detection magnet provided on the second surface of the second magnet holder at a location permitting detection of a magnetic flux of the position detection magnet by the magnetic-pole-position detection element, and wherein the magnet, the first magnet holder, the second magnet holder, the back yoke, the sleeve bearing, and the position detection magnet are assembled integrally together with a thermoplastic resin, and the impeller attachment portion is formed of the thermoplastic resin. |
