Patent ID: 8328540

Claim:
A structural improvement of submersible cooling pumps, comprising a motor set, an impeller set and a stud set, wherein said motor set has a motor casing, which has two or more screw holes on an upper rim thereof to allow fastening of the motor casing to a top plate by screws; a fan and a motor cover disposed on said top plate, said motor cover having arrow-shaped sight holes and cross-shaped ventilating holes densely distributed in an area encompassed by the sight holes, said motor cover having through holes on a side for attachment to said top plate along with screw holes on the top plate by screws; and a fixing base, a bottom of said motor casing fitting on an upper rim of a trough thereof and screw fastened to fixing hole bases thereof, and both sides thereof extending to form positioning flanges; on said fixing base, an outlet port is provided on one side and an axial hole is in a center for a shaft to extend through, on both sides of the axial hole is an ingress of water and a fixing hole, which allows screw fastening of another component, and a passage in communication with said ingress of water and said outlet port are provided; a protecting cover is provided on top of said motor cover, said protecting cover having, on an inner side, flexible clips whose positions correspond to positions of the sight holes on said motor cover, said flexible clips having an end extending to form a flexible hook to engage with an inner edge of the sight holes on said motor cover, which has a rim with a height equal to that of said flexible clips, and, also on its inner side, matching poles whose positions correspond to positions of the ventilating holes on said motor cover; said impeller set consists of a top cover, a set of vanes and a bottom cover, of which the top cover has an inlet hole for the motor shaft to extend through, an outlet hole and a fixing hole each on one different side of said inlet hole, and a plurality of threaded holes; amid said set of vanes a bearing base is provided to accommodate the motor shaft and allow it to drive the vanes; said bottom cover has a chamber to accommodate said set of vanes, and threaded holes corresponding to said top cover such that the bottom cover can securely combine with the top cover by screws in an equal number of the threaded holes; said stud set consists of a duct pipe and a support pipe, both of the same length; wherein a top end of said duct pipe fits in the ingress of water of the motor set, and a bottom end of the same pipe fits in the outlet hole of the impeller set; female threads are provided on both ends of said support pipe, through which the support pipe is securely set in place in the positioning hole of the motor set and the fixing hole of the impeller set by screws.