Alternating rotating movement into circular movement converter for bicycle drive has crank driving sun and planet pinions connected by chain

摘要

The bicycle transmission comprises a primary crank (2) rotating with a shaft (1). A satellite is composed of a pinion (5) and a secondary crank (3) on a shaft (4). The satellite rotates freely at the end of the primary crank. A fixed pinion (7) concentric with the shaft (1) teeth in a ratio of 2 to 1 with the pinion (5). A chain (6) connecting the satellite pinion to the fixed pinion ensures rotation of the satellite in an orbital movement.