| 摘要 |
A water pump includes an engage mechanism 25 which is disposed between a pump body 21 and the end portion of a pump shaft 23 opposite to the side where an impeller 22 is attached, while engaging the pump shaft to the pump body against the urging force of the urging member which urges a mechanical seal 24 . The engage mechanism includes an annular member 26 which is rotatably fitted to the pump shaft 23 while contacting the pump body 21 , and a cylindrical engage pin 27 which pierces the pump shaft 23 in the diameter direction while sandwiching the annular member 26 with the pump body 21.
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