| 摘要 |
PROBLEM TO BE SOLVED: To prevent a pump performance from lowering and reduce manufacturing cost by preventing a rotor rotational shaft and a rotor body from being displaced and rattled at a tightened part in a pump rotor. SOLUTION: This pump rotor comprises the rotor rotating shaft 2 and the rotor body 1 having stepped shaft hole parts with a hole diameter gradually increased from one end so that the corresponding shaft hole parts can be fitted to the stepped shaft parts formed by gradually increasing the shaft diameter of the rotating shaft from one end with a press-fit margin. The rotor rotating shaft 2 and the rotor body 1 are formed to be fixed by a circumferential groove fitted part 11, an axially groove fitted part 14, a first press-fit part 17, and a second press-fit part 18. Thus, the rotor rotating shaft and the rotor body are prevented from being moved relative to each other in both the longitudinal and circumferential directions of the shaft to eliminate the displacement and rattling, and can be firmly integrated with each other. COPYRIGHT: (C)2005,JPO&NCIPI
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