Stepless planetary gearchange system for rear wheel hub of bicycle has sunwheel with patterned conical surfaces, planet wheels with sliding bolts in rims and rings with conical surfaces

摘要

The sunwheel (13) is made in two axially sliding halves with patterned conical surfaces engaging bolts sliding in bores in the rims of four planet gears (15). The planet gear axles (18) are pivoted to a planet wheel carrier (14) so that the planet gears can move radially inward and outward. Two axially sliding rings with conical surfaces engage the bolts on the planet gears and drive the hub. The central shaft (19) is stationary and holds the sunwheel. There is a gearchange rod (21) adjacent to the shaft. The drive sprocket (16) is fastened to the planet wheel carrier.