Drive shaft connection for eccentric worm pump has disk on end of drive shaft with four small diameter pegs engaging in large diameter holes in disk on end of worm

摘要

The worm rotor (5) turns in a profiled stator (3) made of an elastomer to define pumping chambers (4). The end of the rotor may move laterally with respect to the end of the drive shaft (6). The drive shaft runs in taper roller bearings (9) and passes through a seal (15). The shaft coupling (12) consists of a disk (13) on the end of the drive shaft with four small diameter pegs (17) engaging in large diameter holes (18) in a disk on the end of the worm rotor (14).