Home – Home – Jornals – Fundamental and applied issues of mining 2020 number 1

The conditions of self-braking in harmonic drives with a flexible wheel made in the form of a bushing chain are considered. A special feature of the harmonic drive is the design which has a dual generator and a double-crowned sprocket. This design allows to avoid skewing the chain under load. The criteria for self-braking in chain harmonic drives are defined. It is found that for chain harmonic drives in the range of gear ratios over 30, the effect of self-braking is provided. In the range of gear ratios up to 30 to achieve the effect of self-braking, it is necessary to use extra-centroid gearing.