| 摘要 |
<p>This invention relates to a water pump for internal combustion engines, capable of effectively preventing the entry of dust into a bearing for an impeller shaft, and providing a small-sized simply constructed dustproof structure. In this water pump, a fan (32) is mounted on the portion of an impeller shaft (18) which is positioned on the inner surface side of a cup-shaped hood (30), and the entry of dust into bearings (22F, 22R) is prevented by this fan (32). The hood (30) is provided with blowout holes (44) in the portions thereof which are opposed to the outer circumference of the fan (32).</p> |
