| 摘要 |
<p>A coolant pump system (10) driven by an electric motor (16) mounted in-line with the pump shaft (196) to the pump housing (12). The system minimally includes a pump body (192) having a bore (200) therein, a coolant pump impeller (194), a pump shaft (196) passing through the bore and having the impeller mounted on one end thereof, and a bearingless seal shaft assembly (198) disposed in the bore which prevents coolant from leaking out of the body around the rotating pump shaft. The outer end (320) of the pump shaft (196) and the drive shaft (18) of the electric motor preferably include a quick-disconnect coupler which allows the two shafts to be repeatedly coupled and uncoupled without damage and without tools. This coupling mechanism may take the form of a socket (322) with bayonet slot (334, 338) on one shaft (196) and mating pin (326) on the other shaft (18) that fits in the slot. A face-mounted electric motor (16) is rigidly but removably bolted to the pump housing, and its drive shaft (18) provides complete support for the pump shaft (196) which rotates therewith. A double-ended drive shaft (18) may be used in the electric motor (112) if desired. This arrangement allows a cooling fan assembly (20) with integral clutch mechanism (22) to be driven off one end (118) of the motor shaft, while the coolant pump shaft (196) is driven off of the other end of the motor shaft.</p> |
