| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an impeller in which a metallic bush can be inserted correctly into a synthetic resin impeller main body manufactured by resin molding using a die, and a determination as to whether the impeller has been manufactured correctly is made easily. <P>SOLUTION: The impeller comprises: the metallic bush 2 comprising a circumferential boss portion 21 having a substantially truncated cone-shaped throttle portion 211 positioned on a front surface axial end side, a periaxial support boss portion 22 positioned in an axial center, and a circumferential protruding portion 24 positioned on a back surface axial end side; and the impeller main body A made of synthetic resin and formed with a V-shaped bulging portion 11 that bulges axially in the center of a front surface side of a disk-shaped vane portion fulcrum 1, in which a plurality of vanes 12 are formed integrally on the periphery of the V-shaped bulging portion 11. An outer diameter of the circumferential protruding portion 24 of the bush 2 is formed to be smaller than an outer diameter of an axial end location of the throttle portion 211, the circumferential protruding portion 24 is positioned on a back surface side of the V-shaped bulging portion 11, and the bush 2 is inserted into the V-shaped bulging portion 11. <P>COPYRIGHT: (C)2008,JPO&INPIT |
