Mechanisms of a cyclo gear reducer with several gear ratios

In this paper, we explain about an application of a cyclo gear reducer. The original cyclo gear reducer mainly consists of eccentric input axis, geostationary internal sun gears, planetary gears and an output disk. Generally, it is known that the cyclo gear reducer has a deceleration ratio of engagement that is two and three times higher than the usual involute spur gears. As one of the applications of the cyclo gear reducer we develop the cyclo gear reducer that can semi-continuously change the deceleration ratio by installing the mechanism where the slide moves along the direction of the rotation axis in the epitrochoid gear. For the epitrochoid gear that we design here, one epitrochoid curve gear forming from several parameters is installed on the side, and the other gear consisting of different epitrochoid curve shape is installed on the other side.