Joints and connections – Interfitted members – Including separably interposed key
Patent
1994-09-28
1997-05-06
Jordan, Charles T.
Joints and connections
Interfitted members
Including separably interposed key
B25G 328
Patent
active
H00016470
ABSTRACT:
A coupling for a torsional drive includes a rotatable shaft, an outer surface of which has a keyway comprising a half-round groove. A rotatable hub disposed around the shaft and coaxial with the shaft has an inner surface provided with a second keyway, the second keyway also having a half-round groove. The two keyways are alignable so as to form a cylindrical keyway between the hub and the shaft. A cylindrical key is insertable into the cylindrical keyway between the shaft and the hub to prevent relative rotation therebetween. A plug disposed inside the rotatable shaft prevents radial deformation of the shaft. The material of the hub and the shaft may differ, in which case the material of the key is optimized to reduce stress concentrations and stiffness differentials between the hub and the shaft. The cylindrical key and the cylindrical keyway also may be conically tapered. The formed keyway and key may also be elliptical.
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Chelliah Meena
Jordan Charles T.
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