Prior to the advent of cycloidal gear pumps, cycloidal gears have been used in the watch industry, and cycloidal meshing has also begun in later machine construction. The rapid development of involute meshing, especially after the invention of the hobbing of the gear teeth, almost completely swayed the cycloidal gear mesh from the machine and the instrument, with the exception of the clockwork. a) When the lubrication is insufficient, the wear of the cycloidal profile is small; b) The cycloid gear has a large overlap coefficient, so it is possible to use a pinion with a smaller number of teeth; c) the overlap factor caused by the manufacturing error (the center distance is increased, the tip circle is reduced), and the cycloidal meshing is not as dangerous as the involute meshing; d) For the speed-increasing transmission of the clock mechanism, when the cycloidal meshing is used, the force transmission is better. In recent years, machine tools for processing small-modulus cycloidal gears by hobbing have appeared, which greatly increases the productivity of manufacturing cycloidal gears. However, the advantages of involute meshing are that the gear ratio remains constant when the center distance is changed, the shape of the incisor tool is simple, etc. The advantages of line gear meshing are not comparable. However, in the machine manufacturing industry, the cycloidal meshing was not completely squeezed out. Until now, cycloidal meshing has been applied to the machine building industry with the combination of cycloidal pinwheels and Roots wheels. In recent years, cycloidal meshing has gained application and development in various types of cycloidal pumps, and the development of numerical control technology has also It provides favorable technical support for the processing of complex curved meshing profiles, and also provides a broad market prospect for the application and development of cycloidal gear pumps.
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Experts in the watch industry believe that there are many advantages to using a cycloidal meshing in a clockwork tissue rather than an involute engagement: