抄録
Servo couplings are required both torsional rigidity and shearing or bending flexibility to maintain constant velocity between drive and driven shafts subject to one or more kinds of misalignment. Diaphragm couplings typically have the torsional stiffness several times larger than that of other types of flexible servo couplings. In the previous papers, the transmission errors and the lateral loads between the drive and driven shafts connected by a flexible coupling are measured. In this paper, the transmission errors and the lateral loads generated in several types of diaphragm couplings are measured, and the influences of the combination of parallel-offset and angular misalignments on them are clarified. The causes for the generation of transmission error in the diaphragm couplings are also investigated. The results may be summarized in the following. (1) Transmission error of single diaphragm coupling changes with a 2 cycle per 1 round and its amplitude increases as angular misalignment increases. (2) Double diaphragm couplings achieve excellent performance against parallel-offset misalignment, but the performance is lowered when the angular misalignment is added to the parallel-offset misalignment. (3) Transmission error of the diaphragm coupling can be estimated by the application of the equation to be used in the calculation for that of the double Hooke's joint (universal joint). (4) Lateral loads generated between the drive and driven shafts connected by the double diaphragm coupling are made up of the component proportional to the parallel-offset misalignment and the alternative component almost independent the misalignments.
