| 摘要 |
A conveyor drive assembly which is configured and constructed to resist the effects of various chemical substances, while accomplishing controlled and regulated rotation of a plurality of conveyor rollers. A preferred drive assembly in accordance with the invention comprises an elongate non-cylindrical drive shaft having a plurality of roller drivers or worms disposed about the drive shaft at spaced locations along the length thereof. Spacers and various bearings may also be positioned upon the shaft. The shaft, worms, spacers, bearings and other components are formed of plastic or other chemically resistant material. The non-cylindrical configuration of the drive shaft enables the drive shaft to rotatably engage the worms and/or bearing members without the need for machined keyways, set screws or other cut away regions formed in the exterior of the shaft as would result in weakening of the shaft or cause retention of corrosive chemicals therein. In certain applications wherein glass reactive chemicals are employed, the drive shaft is formed of plastic which is devoid of glass reinforcement fibers. Also, any glass bearings are replaced by non-glass material such as ceramic or nylon.
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