HIGH-EFFICIENCY STEEPLESS SPEED CHANGE GEAR OF MECHANICAL TYPE

摘要

A steepless speed change gear of mechanical type, designed to accomplish changes in the transmission ratio between a driving shaft (1) and at least one driven shaft (2), parallel to each other, which shafts are provided with external parallel splines (i.e., longitudinal grooves) and, at their mutually opposite ends, with a disk-shaped element (4) bearing a group of pheripherally hinged arms (7) which can be angularly divaricated in directions specularly opposite to each other, with a slide (9) being hinged onto the free end of each of said arms (7), which slide is provided with a channel axially oriented relatively to the respective arm, and is furthermore provided, on its external side, with an arcuate groove. Said external, arcuate grooves, considered as a whole, constitute a pulley capable of housing a 'V' transmission belt (13), with the divaricating of said arms being secured by the sliding of said slides along two cone frustum-shaped bodies (14) mounted side-by-side and with their tapers opposite to each other, and translatable along said splines of the driving shaft and of the driven shaft.