| 摘要 |
<p>An electronic deadbolt lock (10) having a motor drive assembly with a DC motor (14') and corresponding drive shaft (20') coupled to a worm gear (16'). The motor drive assembly features a split-pspring pin coupler (18) connecting the drive shaft (20') and the worm gear (16'). The split-spring pin (18) comprises a cylindrical band of metal having an axial split that forms two abutments (22, 24) extending the length of the pin (18). In its unflexed state, the split-spring pin (18) has an inner diameter that is less than the outer diameter of the drive shaft (20') such that the split-spring pin (18) can be fit onto the distal end of the drive shaft (20'). Subsequently, the worm gear (16'), having an inner diameter less than the outer diameter of the split-spring pin (18) and drive shaft assembly, is press-fit onto such assembly. In operation, the drive shaft (20') and worm gear (16') are secured together by the combination of the radially inward force of the split sping pin (18) and the embedding of the split spring pin's abutments (22, 24) into the worm gear (16').</p> |
