This paper is about the chain-wave transmission (CWT), that is a new kind of harmonic drives. The objective of this work is the determination of the angle of pressure in chain-wave mechanisms and the investigation to find the constraint between the angle of pressure and geometrical parameters of the CWT. In the first part are described also objectives for the creation of the chain-wave transmission and main advantages of its construction. It is determined the angle of pressure on the basis of dynamic syntheses of the chain-wave mechanism. The compression factor of the form of the wave generator is taken as a geometric parameter, which is influence upon the angle of pressure. It is determined also that the compression factor depends on number of teeth of the interacting sprocket and on factor of multiplicity of the CWT and it is necessary to limit their values at designing of chain-wave mechanisms. Keywords. Chain-Wave Transmission. Wave Generator, Sprocket, Roller, Angle of Pressure, Compression Factor.
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